LightmappedReflective

LightmappedReflective is the shader used by func_reflective_glass. This shader renders real-time reflection and refractions similar to Water (shader).

 Warning: All parameters listed in the example (except $bumpframe, %tooltexture and $surfaceprop) must be included when used, or func_reflective_glass may not work properly.

Example

The example shown here is materials/glass/reflectiveglass001.vmt

"lightmappedreflective"
{
	"%tooltexture" "dev/flat_normal"
	"$refracttexture" "_rt_WaterRefraction"
	"$refractamount" "0"
	"$refracttint" "[.5 .5 .6]"

	"$reflecttexture" "_rt_WaterReflection"
	"$reflectamount" "0"
	"$reflecttint" "[1 1 1]"

	"$fresnelpower" "0"
	"$minreflectivity" "0.8"
	"$maxreflectivity" "1.0"
	
	"$normalmap" "dev/flat_normal"

	"$surfaceprop" "glass"
	"$bumpframe" "0"
}

 Bug: Adding proxies to a lightmappedreflective causes the texture to not be drawn. (Could this be because it includes some default proxy in order for it to work, and once there is a user-defined proxy, those "behind the scenes" proxies are no longer there?)

 Bug: Does not appear to work in Portal 2

To do: Does it work in portal 1?

Shader parameters

Textures

$basetexture <texture>

Albedo texture, optional.

$normalmap <texture>

bump map, per-pixel warping of the reflection

$bumpframe <integer>

Frame to start the animated du/dv map and bump map on, respectively. Somewhat confusingly, $bumpframe affects $normalmap, which should be pointing to a bump map.

$bumptransform <matrix>

Transforms the bump map texture.

The default position is "center .5 .5 scale 1 1 rotate 0 translate 0 0".

1. center defines the point of rotation. Only useful if rotate is being used.
2. scale fits the texture into the material the given number of times. '2 1' is a 50% scale in the X axis.
3. rotate rotates the texture counter-clockwise in degrees. Accepts any number, including negatives.
4. translate shifts the texture by the given numbers. '.5' will shift it half-way.

 Note: All values must be included!

 Bug: Scaling the texture may cause odd issues where the Texture Lock tool in Hammer will not actually lock the texture in place.

 Bug: Rotating textures applied on brushes will rotate around the map origin (confirm: Orangebox engine only?). A fix for this is to change the center position in the VMT to the brush's origin.

Reflection

$reflecttexture <texture>

Texture to use for reflection. For real-time reflections, use _rt_WaterReflection.

$reflectamount <float>

Amount of warp for the reflection. Higher values produce more warping.

$reflecttint <RGB matrix>

Color tint for the real-time reflection.

$reflectance <float>

Controls opacity of reflection. Similar to $alpha

$envmapmask <texture>

Per-pixel opacity of reflection

$minreflectivity <float>

To do: What is this?

$maxreflectivity <float>

To do: What is this?

Refraction

$refracttexture <texture>

Texture to use for refraction. For real-time refractions, use _rt_WaterRefraction.

$refractamount <float>

Amount of warp for the refraction. Higher values produce more warping.

$refracttint <RGB matrix>

Color of the refraction.

 Warning: It is recommended that you set this to white or something close to white so that edge transitions work properly on DX9.

Other

$surfaceprop <name>

See $surfaceprop.

%tooltexture <texture>

Defines the texture Hammer will display in the material browser.

$fresnelpower <float>

Controls fresnel effect of reflections.

$translucent <boolean>

No effect, but must be included or entity will not work properly. To do: double check. Does it work in other source engine versions?