Water (shader): Difference between revisions

Revision as of 15:54, 7 June 2019

Water reflecting entities in real-time in Episode Two.

Left 4 Dead 2 introduced flowing water.

Water It creates water that realistically reflects and refracts the world, and that can flow throughout a map.

Special behaviour

Expensive and cheap: Water materials fall into two groups: expensive and cheap. Expensive water reflects and refracts the world in real-time, while cheap water uses an $envmap and does not refract. Users can disable expensive water rendering through their video options, so always place env_cubemaps.
Above and below: Water actually requires two materials: one for above the surface and one for below. These materials are independent of each other, but of course for proper effect need to correlate in most areas.
Flow Mapping: Water can flow in arbitrary directions. It's very tricky to create a flow map by hand however, and the tool Valve used internally hasn't been released.

Shader parameters

Textures

Note:In games before

, there is no $basetexture. The surface is a combination of fog color, animated bump map, reflection and refraction.

$abovewater $bottommaterial $underwateroverlay [[$bumpmap|$bumpmap]] [[$normalmap|$normalmap]] $dudvframe $bumpframe $bumptransform $scale $flashlighttint $waterdepth $depth_feather

Flowing water

$scroll1 "[<normal X> <normal Y>]" (in all games since )
$scroll2 "[<normal X> <normal Y>]" (in all games since ): If $scroll1 is defined and X is not zero, two more instances of the normal map will be drawn in such a way that they are merged together. The first layer is 7x larger and rotated 45°; the second is 2x larger and rotated 90°. The parameters specify the speed and direction that the extra layers will move. (Valve's materials usually contain a third number, but it doesn't have any apparent effect and is most likely obsolete.)

Flowmaps

$flowmap $flow_normaluvscale $flow_worlduvscale $flow_uvscrolldistance $flow_timeintervalinseconds $flow_timescale $flow_bumpstrength $flow_noise_texture $flow_noise_scale $flow_debug

Basetexture Flow

$basetexture $color_flow_uvscale $color_flow_timescale $color_flow_timeintervalinseconds $color_flow_uvscrolldistance $color_flow_lerpexp $color_flow_displacebynormalstrength

Authoring a flow map

Directions of water flow depend on the red and green channels of the flow map.

Overall, trying to create a flow map manually is a nightmare. Painting the flowmap, fitting it into the world, and painting foam, is extremely difficult.

But if you do want to give it a try, flow direction is read from the red and green channels of the flow map. 50% tone means no movement.

The texture scale of any faces using a water texture with a flow map appear to have a direct correlation on the flow map. The fewer water faces or planes you use the easier the process of authoring a custom flow map will be (selecting all of your water faces and using 'treat as one' when using the fit scaling may also be an option)

Red channel: X axis
Green channel: Y axis
Alpha channel: Controls $basetexture blend from onwards.

There are now tools to assist in painting flowmaps.: Flow field editor from algoholic.eu : http://algoholic.eu/another-flow-field-editor-update/; Flowmap generator (paid): http://www.superpositiongames.com/products/flowmap-generator; Creating flowmaps using Houdini (UDK) : https://www.dropbox.com/s/ii2x077vj64lyhl/Water%20Flow%20For%20UDK.pdf

Other

%compilewater $surfaceprop %tooltexture

WaterLOD proxy: This connects the water_lod_control entity in a level to the water’s internal parameters. This must be declared in the material for the LOD mechanisms to work properly.

@@ Line 2: / Line 2: @@
 [[File:L4d2 flowmap user.jpg|thumb|200px|[[Left 4 Dead 2]] introduced [[#Flowing water|flowing water]].]]
-'''<code>Water</code>''' is a [[material]] [[shader]] used for water. Water in Source is complex, and can be animated, refract and reflect the world in real-time, and flow throughout a map.
+{{Shader|Water}} It creates water that realistically reflects and refracts the world, and that can flow throughout a map.
 == Special behaviour ==
@@ Line 19: / Line 19: @@
 {{note|In games before {{As}}, there is no <code>[[$basetexture]]</code>. The surface is a combination of fog color, animated bump map, reflection and refraction.}}
-; <code>$abovewater <[[bool]]></code>
+{{MatParam|$abovewater|bool|Whether this material is used for above or below the water’s surface.}}
-: Whether this material is used for above or below the water’s surface.
+{{MatParam|$bottommaterial|material|Required parameter. This is the material ('''not''' texture) to use when underneath the water’s surface. The bottom material must have <code>$reflecttexture</code>, <code>$abovewater</code> and <code>$envmap</code> disabled, but can otherwise do whatever it wants.}}
-; <code>$bottommaterial <[[material]]></code>
+{{MatParam|$underwateroverlay|material|Applies a refracting screen overlay when the camera is underwater. Generally used with <code>effects\water_warp01</code>. Requires <code>$abovewater</code> to be 0.|since=EP2}}
-: Required field. This is the material ('''not''' texture) to use when underneath the water’s surface. The bottom material must have <code>$reflecttexture</code>, <code>$abovewater</code> and <code>$envmap</code> disabled, but can otherwise do whatever it wants.
+{{MatParam|[[Du/dv_map|$bumpmap]]|texture|dx8=1}}
-; <code>$underwateroverlay <material></code> {{EP2 add}}
+{{MatParam|[[normalmap|$normalmap]]|texture|A [[Du/dv map]] for DirectX 8 rendering (<code>$bumpmap</code>), and a [[bump map]] for DirectX 9 and above (<code>$normalmap</code>). These should be animated unless the water is to be perfectly still or you're using a flowmap, which makes an animated bump map redundant.
-: Applies a refracting screen overlay when the camera is underwater. Generally used with <code>effects\water_warp01</code>. Requires <code>$abovewater</code> to be 0.
+: {{note|The <code>[[normalmap|$normalmap]]</code> command is unique to the <code>Water</code> shader, and uses a [[normalmap|normal map]]. A [[Du/dv_map|du/dv map]] is used for <code>[[$bumpmap]]</code> when using the <code>Water</code> shader. The <code>[[Du/dv_map|$dudvmap]]</code> command is obsolete.}} {{tip|Use <code>$bumptransform</code> with the [[TextureScroll]] proxy to move the normal map in pre-2006 engine branches.}}}}
-; <code>[[Du/dv_map|$bumpmap]] <[[texture]]></code>
+{{MatParam|$dudvframe|int}}
-; <code>[[normalmap|$normalmap]] <texture></code>
+{{MatParam|$bumpframe|int|Frame to start the animated du/dv map and bump map on, respectively. Somewhat confusingly, <code>$bumpframe</code> affects <code>$''normal''map</code>, which should be pointing to a [[bump map]].}}
-: A [[Du/dv map]] for DirectX 8 rendering (<code>$bumpmap</code>), and a [[bump map]] for DirectX 9 and above (<code>$normalmap</code>). These should be animated unless the water is to be perfectly still or you're using a flowmap, which makes an animated bump map redundant.
+{{MatParam|$bumptransform|matrix|Transforms the bump map texture.
-: {{note|The <code>[[normalmap|$normalmap]]</code> command is unique to the <code>Water</code> shader, and uses a [[normalmap|normal map]]. A [[Du/dv_map|du/dv map]] is used for <code>[[$bumpmap]]</code> when using the <code>Water</code> shader. The <code>[[Du/dv_map|$dudvmap]]</code> command is obsolete.}} {{tip|Use <code>$bumptransform</code> with the [[TextureScroll]] proxy to move the normal map in pre-2006 engine branches.}}
+{{VMT UVtransform}}}}
-; <code>$dudvframe <[[int]]></code>
+{{MatParam|$scale|vector2|{{todo|What does this do?}}}}
-; <code>$bumpframe <int></code>
+{{MatParam|$flashlighttint|float|{{confirm|How much projected textures should tint the water?}}|since=l4d2}}
-: Frame to start the animated du/dv map and bump map on, respectively. Somewhat confusingly, <code>$bumpframe</code> affects <code>$''normal''map</code>, which should be pointing to a [[bump map]].
+{{MatParam|$waterdepth|float|{{todo|What does this do exactly? Seems like it's related to $waterblendfactor, Found in liquids/nuke_water.vmt. Found in 2006/2007 code, does it do anything there?}}|since=CSGO}}
-; <code>$bumptransform <[[matrix]]></code>
+{{MatParam|$depth_feather|int|{{todo|What does this do exactly? Found in liquids/nuke_water.vmt.}}|since=CSGO}}
-: Transforms the bump map texture.
-{{VMT UVtransform}}
-; <code>$scale <vector2></code>
-: {{todo|What does this do?}}
-; <code>$flashlighttint <[[float]]></code> {{l4d2 add}}
-: {{confirm|How much projected textures should tint the water?}}
-; <code>$waterdepth <float></code> {{CSGO add}}
-: {{todo|What does this do exactly? Seems like it's related to $waterblendfactor, Found in liquids/nuke_water.vmt. Found in 2006/2007 code, does it do anything there?}}
-; <code>$depth_feather <int></code> {{CSGO add}}
-: {{todo|What does this do exactly? Found in liquids/nuke_water.vmt.}}
 === Fog ===
-; <code>$fogcolor <[[RGB]] matrix></code>
+{{MatParam|$fogcolor|RGB matrix|Color of the water’s volumetric fog. Generally this value should match the color used in the bottom material.}}
-: Color of the water’s volumetric fog. Generally this value should match the color used in the bottom material.
+{{MatParam|$fogenable|bool|Enable volumetric fog for the water.}}
-; <code>$fogenable <bool></code>
+{{MatParam|$fogstart|float|Distance in inches from the eye at which water fog starts.
-: Enable volumetric fog for the water.
+: {{warning|Must be 0 for edge fading to work properly.}}}}
-; <code>$fogstart <float></code>
+{{MatParam|$fogend|float|Distance in inches from the eye at which water fog ends.}}
-: Distance in inches from the eye at which water fog starts.
+{{MatParam|$lightmapwaterfog|bool|Allows the fog to receive [[lightmap]]s, so that static objects can cast shadows onto the water. Must be enabled when the map is compiled.|since=l4d2}}
-: {{warning|Must be 0 for edge fading to work properly.}}
-; <code>$fogend <float></code>
-: Distance in inches from the eye at which water fog ends.
-; <code>$lightmapwaterfog <[[bool]]></code> {{l4d2 add}}
-: Allows the fog to receive [[lightmap]]s, so that static objects can cast shadows onto the water. Must be enabled when the map is compiled.
 === Reflection ===
-; <code>$reflecttexture <texture></code>
+{{MatParam|$reflecttexture|texture|Texture to use for reflection. For real-time reflections, use <code>[[_rt_WaterReflection]]</code>.}}
-: Texture to use for reflection. For real-time reflections, use <code>[[_rt_WaterReflection]]</code>.
+{{MatParam|[[$envmap]]|[[env_cubemap]] / [[texture]]|See <code>[[$envmap]]</code>. Provides reflections for cheap water.
-; <code>$envmap <[[env_cubemap]] / [[texture]]></code>
+: {{Note|Don't use this on underwater materials.}}}}
-: See <code>[[$envmap]]</code>. Provides reflections for cheap water.
+{{MatParam|$envmapframe|int|The frame to start an animated cubemap on.}}
-: {{Note|Don't use this on underwater materials.}}
+{{MatParam|$forceenvmap|bool|Forces the water to use <code>$envmap</code> for reflections.|since=p2}}
-; <code>$envmapframe <int></code>
+{{MatParam|$forcecheap|bool|Force the water to render itself as [[cheap]], regardless of the map's {{ent|water_lod_control}} entity settings or the user's settings. This will disable real-time reflection and instead use <code>$envmap</code>. Refraction is assumed to be opaquely the water fog color.}}
-: The frame to start an animated cubemap on.
+{{MatParam|$forceexpensive|bool|Force the water to render itself as [[expensive]], regardless of the map's <code>water_lod_control</code> entity settings or the user's settings.}}
-; <code>$forceenvmap <bool></code> {{p2 add}}
+{{MatParam|$cheapwaterstartdistance|float|Distance from the eye in inches that the shader should start transitioning to a cheaper water shader.}}
-: Forces the water to use <code>$envmap</code> for reflections.
+{{MatParam|$cheapwaterenddistance|float|Distance from the eye in inches that the shader should finish transitioning to a cheaper water shader.}}
-; <code>$forcecheap <bool></code>
+{{MatParam|$reflectskyboxonly|bool|Make the water reflect only the [[skybox]].|since=l4d2}}
-: Force the water to render itself as [[cheap]], regardless of the map's {{ent|water_lod_control}} entity settings or the user's settings. This will disable real-time reflection and instead use <code>$envmap</code>. Refraction is assumed to be opaquely the water fog color.
+{{MatParam|$reflect2dskybox|bool|Make the water reflect the [[skybox]] material ''in addition'' to other reflections.|since=p2}}
-; <code>$forceexpensive <bool></code>
+{{MatParam|$reflect3dskybox|bool|Make the water reflect the 3D skybox ''in addition'' to other reflections. Added in the Danger Zone update and used on '''dz_blacksite.'''
-: Force the water to render itself as [[expensive]], regardless of the map's <code>water_lod_control</code> entity settings or the user's settings.
+: {{Note|Requires a {{ent|sky_camera}} entity to be placed in the map, otherwise this might cause crashes.}}|since=CSGO}}
-; <code>$cheapwaterstartdistance <float></code>
+{{MatParam|$reflectentities|bool|Make the water reflect entities. By default, no entities are reflected.}}
-: Distance from the eye in inches that the shader should start transitioning to a cheaper water shader.
+{{MatParam|$reflectonlymarkedentities|bool|Make the water reflect only entities and static props with "Render in Fast Reflections" enabled.|since=p2}}
-; <code>$cheapwaterenddistance <float></code>
+{{MatParam|$reflectamount|float|Amount of warp for the reflection. Higher values produce more visible reflections.}}
-: Distance from the eye in inches that the shader should finish transitioning to a cheaper water shader.
+{{MatParam|$reflecttint|RGB matrix|Color tint for the real-time reflection and environment map.}}
-; <code>$reflect2dskybox</code> <bool> {{p2 add}}
+{{MatParam|$reflectblendfactor|float|{{todo|What does this do?}}}}
-: Make the water reflect the [[skybox]] material ''in addition'' to other reflections.
+{{MatParam|$nofresnel|bool|Disable the fresnel on the water's reflection.
-; <code>$reflect3dskybox</code> <bool> {{CSGO add}}
+: {{Bug|Does not do anything in any engine branch.}}|since=EP1}}
-: Make the water reflect the 3D skybox in addition to other reflections. Added in the Danger Zone update and used on ''dz_blacksite.''
+{{MatParam|$forcefresnel|float|Force this amount of fresnel on the water. Higher values usually cause the water to appear brighter. {{bug|Does not work properly in {{insurgency}}{{doi}}.}}|since=AS}}
-: {{Note|Requires a {{ent|sky_camera}} entity to be placed in the map, otherwise this might cause crashes.}}
+{{MatParam|$basereflectance|float|{{todo|What is this?}}}}
-; <code>$reflectskyboxonly <bool></code> {{l4d2 add}}
+{{MatParam|$maxreflectance|float|{{todo|What is this?}}}}
-: Make the water reflect only the [[skybox]].
-; <code>$reflectentities <bool></code>
-: Make the water reflect entities. By default, no entities are reflected.
-; <code>$reflectonlymarkedentities <bool></code> {{p2 add}}
-: Make the water reflect only entities and static props with "Render in Fast Reflections" enabled.
-; <code>$reflectamount <float></code>
-: Amount of warp for the reflection. Higher values produce more visible reflections.
-; <code>$reflecttint <[[RGB]] matrix></code>
-: Color tint for the real-time reflection and environment map.
-; <code>$reflectblendfactor <float></code>
-: {{todo|What does this do?}}
-; <code>$nofresnel <bool></code> {{EP1 add}}
-: Disable the fresnel on the water's reflection.
-: {{Bug|Does not do anything in any engine branch.}}
-; <code>$forcefresnel <float></code> {{AS add}}
-: Force this amount of fresnel on the water. Higher values usually cause the water to appear brighter. {{bug|Does not work properly in {{insurgency}}{{doi}}.}}
-; <code>$basereflectance <float></code>
-: {{todo|What is this?}}
-; <code>$maxreflectance <float></code>
-: {{todo|What is this?}}
 ===Refraction===
-; <code>$refract <bool></code> {{l4d2 add}}
+{{MatParam|$refract|bool|Whether the material should refract at all.|since=l4d2}}
-: Whether the material should refract at all.
+{{MatParam|$refracttexture|texture|Texture to use for refraction. For real-time refractions, use <code>[[_rt_WaterRefraction]]</code>.
-; <code>$refractamount <float></code>
+: {{tip|Specify <code>$refracttexture</code> without <code>$reflecttexture</code> to get real-time refraction on <code>$envmap</code> reflections.}}}}
-: Amount of warp for the refraction. Higher values produce more warping.
+{{MatParam|$refractamount|float|Amount of warp for the refraction. Higher values produce more warping.}}
-; <code>$refracttexture <texture></code>
+{{MatParam|$refracttint|RGB matrix|Color of the refraction.
-: Texture to use for refraction. For real-time refractions, use <code>[[_rt_WaterRefraction]]</code>.
+: {{warning|It is recommended that you set this to white or something close to white so that edge transitions work properly on DX9.}}}}
-: {{tip|Specify <code>$refracttexture</code> without <code>$reflecttexture</code> to get real-time refraction on <code>$envmap</code> reflections.}}
+{{MatParam|$blurrefract|bool|Blurs the refraction when underwater.
-; <code>$refracttint <[[RGB]] matrix></code>
+: {{warning|Underwater materials only; this will cause buggy behavior on any material with <code>$abovewater</code> set to 1.}}|since=EP2|dx9=1}}
-: Color of the refraction.
+{{MatParam|$pseudotranslucent|bool|Make the water translucent. This is a cheap substitute for refractive water; do not use this when refraction is enabled.|since=p2}}
-: {{warning|It is recommended that you set this to white or something close to white so that edge transitions work properly on DX9.}}
+{{MatParam|$waterblendfactor|normal|How translucent the water should be when <code>$pseudotranslucent</code> is enabled. At 0, the water is completely transparent, while at 1 the water is completely opaque.|since=p2}}
-; <code>$blurrefract <bool></code> {{EP2 add}} {{dx9}}
-: Applies a blur to the refraction when underwater.
-: {{warning|Underwater materials only; this will cause buggy behavior on any material with <code>$abovewater</code> set to 1.}}
-; <code>$pseudotranslucent <bool></code> {{p2 add}}
-: Make the water translucent. This is a cheap substitute for refractive water; do not use this when refraction is enabled.
-; <code>$waterblendfactor <[[normal]]></code> {{p2 add}}
-: How translucent the water should be when <code>$pseudotranslucent</code> is enabled. At 0, the water is completely transparent, while at 1 the water is completely opaque.
 ; [[Image:Orange Box Scrolling Water.png|right|300px|Size/angle of $scroll1 and $scroll2]]
@@ Line 131: / Line 89: @@
 ==== Flowmaps ====
 [[File:L4d2 flowmap tex.jpg|right|200px|A flowmap texture.]] [[File:L4d2 flowmap dev.jpg|right|200px|The flowmap texture in-engine, shown with $flow_debug 1.]] [[File:L4d2 flowmap user.jpg|right|200px|The result in-engine.]]
-; <code>$flowmap <texture></code> {{l4d2 add}}
+{{MatParam|$flowmap|texture|Texture that defines flow velocity by skewing and scrolling the <code>$normalmap</code>. Valve generates their flowmaps with [https://www.sidefx.com/products/houdini/ Houdini].
-: Texture that defines flow velocity by skewing and scrolling the <code>$normalmap</code>. Valve generates their flowmaps with [http://www.sidefx.com/index.php?option=com_content&task=view&id=1774&Itemid=343 Houdini]
+: [http://www.youtube.com/watch?v{{=}}iY6vkpQDcpU Video of the effect.] For technical details, see [https://steamcdn-a.akamaihd.net/apps/valve/2010/siggraph2010_vlachos_waterflow.pdf Alex Vlachos' SIGGRAPH 2010 paper] and [https://steamcdn-a.akamaihd.net/apps/valve/2011/gdc_2011_grimes_nonstandard_textures.pdf Valve's GDC 2011 paper].|since=l4d2}}
-: [http://www.youtube.com/watch?v=iY6vkpQDcpU Video of the effect.] For technical details, see [https://steamcdn-a.akamaihd.net/apps/valve/2010/siggraph2010_vlachos_waterflow.pdf Alex Vlachos' SIGGRAPH 2010 paper] and [https://steamcdn-a.akamaihd.net/apps/valve/2011/gdc_2011_grimes_nonstandard_textures.pdf Valve's GDC 2011 paper].
+{{MatParam|$flow_normaluvscale|float|The number of world units covered by the normal map before it repeats. Typically in the 100s.|since=l4d2}}
-; <code>$flow_normaluvscale <float></code> {{l4d2 add}}
+{{MatParam|$flow_worlduvscale|float|The number of times the flow map fits into the material. Face texture scale affects this.|since=l4d2}}
-: The number of world units covered by the normal map before it repeats. Typically in the 100s.
+{{MatParam|$flow_uvscrolldistance|float|How far along the flow map the normal map should be distorted. Higher values lead to more distortion.|since=l4d2}}
-; <code>$flow_worlduvscale <float></code> {{l4d2 add}}
+{{MatParam|$flow_timeintervalinseconds|float|Time needed for the normal map to cross the <code>$flow_uvscrolldistance</code>.|since=l4d2}}
-: The number of times the flow map fits into the material. Face texture scale affects this.
+{{MatParam|$flow_timescale|float|Modifies flow speed without affecting the amount of distortion.|since=l4d2}}
-; <code>$flow_uvscrolldistance <float></code>  {{l4d2 add}}
+{{MatParam|$flow_bumpstrength|normal|How rough the surface of the water is.|since=l4d2}}
-: How far along the flow map the normal map should be distorted. Higher values lead to more distortion.
+{{MatParam|$flow_noise_texture|texture|A treatment texture used to break up repetition of the normal map.|since=l4d2}}
-; <code>$flow_timeintervalinseconds <float></code> {{l4d2 add}}
+{{MatParam|$flow_noise_scale|float|How many times to fit the noise texture into the normal map. Typically around 0.01.|since=l4d2}}
-: Time needed for the normal map to cross the <code>$flow_uvscrolldistance</code>.
+{{MatParam|$flow_debug|bool|Replaces the water surface with a literal rendering of the flow map. {{bug|Although the flow map will show up in Hammer, it may not be in the correct place! Don't rely on Hammer's view for alignment.}}|since=l4d2}}
-; <code>$flow_timescale <float></code> {{l4d2 add}}
-: Modifies flow speed without affecting the amount of distortion.
-; <code>$flow_bumpstrength <normal></code> {{l4d2 add}}
-: How rough the surface of the water is.
-; <code>$flow_noise_texture <texture></code> {{l4d2 add}}
-: A treatment texture used to break up repetition of the normal map.
-; <code>$flow_noise_scale <float></code> {{l4d2 add}}
-: How many times to fit the noise texture into the normal map. Typically around 0.01.
-; <code>$flow_debug <bool></code> {{l4d2 add}}
-: Replaces the water surface with a literal rendering of the flow map. {{bug|Although the flow map will show up in Hammer, it may not be in the correct place! Don't rely on Hammer's view for alignment.}}
 ==== Basetexture Flow ====
-; <code>$basetexture <texture></code> {{AS add}}
+{{MatParam|$basetexture|texture|A "sludge layer", used in {{portal2}} for the sludge and debris in test chambers. The alpha channel of the <code>$basetexture</code> acts as a mask for the reflection; darker values are more reflective, while lighter values are less reflective.
-: A "sludge layer", used in {{portal2}} for the sludge in the test chambers. The alpha channel of the <code>$basetexture</code> controls the strength of the reflection; darker values are more reflective, while lighter values are less reflective.
+: {{Note|From {{portal2}} onwards, the opacity of the <code>$basetexture</code> is controlled by the alpha channel of the flowmap.}}|since=AS}}
-; <code>$color_flow_uvscale <float></code> {{AS add}}
+{{MatParam|$color_flow_uvscale|float|The number of world units covered by the base texture before it repeats. Typically in the 100s.|since=AS}}
-: The number of world units covered by the base texture before it repeats. Typically in the 100s.
+{{MatParam|$color_flow_timescale|float|Modifies flow speed without affecting the amount of distortion.|since=AS}}
-; <code>$color_flow_timescale <float></code> {{AS add}}
+{{MatParam|$color_flow_timeintervalinseconds|float|Time needed for the base texture to cross the <code>$color_flow_uvscrolldistance</code>.|since=AS}}
-: Modifies flow speed without affecting the amount of distortion.
+{{MatParam|$color_flow_uvscrolldistance|float|How far along the flow map the base texture should be distorted. Higher values lead to more distortion.|since=AS}}
-; <code>$color_flow_timeintervalinseconds <float></code> {{AS add}}
+{{MatParam|$color_flow_lerpexp|float|How sharp the transition should be between repeats, should be 1.
-: Time needed for the base texture to cross the <code>$color_flow_uvscrolldistance</code>.
+: {{todo|Better explanation}}|since=AS}}
-; <code>$color_flow_uvscrolldistance <float></code> {{AS add}}
+{{MatParam|$color_flow_displacebynormalstrength|float|How much the normal map affects the base texture. Uses extremely low values, usually 0.01 or less.|since=p2}}
-: How far along the flow map the base texture should be distorted. Higher values lead to more distortion.
-; <code>$color_flow_lerpexp <float></code> {{AS add}}
-: How sharp the transition should be between repeats, should be 1.
-: {{todo|Better explanation}}
-; <code>$color_flow_displacebynormalstrength <float></code> {{p2 add}}
-: How much the normal map affects the base texture. Uses extremely low values, usually 0.01 or less.
 ==== Authoring a flow map ====
@@ Line 194: / Line 136: @@
 === Other ===
-; <code>%compilewater <bool></code>
+{{MatParam|%compilewater|bool|This is needed to make a map using the material compile properly.}}
-: This is needed to make a map using the material compile properly.
+{{MatParam|$surfaceprop|water|Tells the physics system that the surface is water. See [[$surfaceprop]].}}
-; <code>$surfaceprop water</code>
+{{MatParam|%tooltexture|texture|Defines the texture Hammer will display in the material browser.}}
-: Tells the physics system that the surface is water. See [[$surfaceprop]].
-; <code>%tooltexture <texture></code>
-: Defines the texture Hammer will display in the material browser.
 ; <code>WaterLOD proxy</code>
 : This connects the [[water_lod_control]] entity in a level to the water’s internal parameters. This must be declared in the material for the LOD mechanisms to work properly.
@@ Line 210: / Line 149: @@
 *[[True reflections under CSS:fr|True reflections under CSS]] (French)
-[[Category:Shaders]]
-[[Category:List of Shader Parameters]]
 [[Category:Water]]

Water (shader): Difference between revisions

Revision as of 15:54, 7 June 2019

Contents

Special behaviour

Shader parameters

Textures

Fog

Reflection

Refraction

Flowing water

Flowmaps

Basetexture Flow

Authoring a flow map

Other

See also

Navigation menu

Water (shader): Difference between revisions

Revision as of 15:54, 7 June 2019

Special behaviour

Shader parameters

Textures

Fog

Reflection

Refraction

Flowing water

Flowmaps

Basetexture Flow

Authoring a flow map

Other

See also

Navigation menu

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