View source for Texture prefixes

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[[WAD]] textures do not have any metadata for special textures. Instead, the first few characters in the texture's name are used to dictate what the texture is used for.

{| class="wikitable"
|-
! Prefix !! Texture type !! Description 
|-
| {{code|{}} || Alphatest || Texels using the last index in the [[palette]] (index 255) will be treated as pure black with an alpha channel value of zero. If tied to an entity with a {{code|rendermode}} other than 0, said texels will be transparent.
|-
| {{code|!}} || Liquid (water) || A liquid, usually water. The face will be drawn with ripples in the [[software renderer]] or waves in the [[OpenGL]] renderer. If part of worldspawn, it will be swimmable. If tied to an entity, only the top face will be drawn.
|-
| {{code|!slime}} || Slime || Like water, deals damage to the player and some monsters when touched (if part of worldspawn).
|-
| {{code|!lava}} || Lava || Like slime, but deals double the damage (if part of worldspawn).
|-
| {{code|!cur_0}} || 0° current
| rowspan=6 | Acts like water combined with a {{ent|trigger_push (GoldSrc)|alt=trigger_push}} with a speed of 2048 in the given direction (if part of worldspawn).
|-
| {{code|!cur_90}} || 90° current
|-
| {{code|!cur_180}} || 180° current
|-
| {{code|!cur_270}} || 270° current
|-
| {{code|!cur_up}} || Upwards current
|-
| {{code|!cur_dwn}} || Downwards current
|-
| {{code|+0}} to {{code|+9}}
| rowspan=2 | Animated/Toggled
| rowspan=2 | Plays all textures in this set in sequence (at roughly 5-6 FPS). If tied to certain entities, such as {{ent|func_wall (GoldSrc)|alt=func_wall}} or {{ent|func_button (GoldSrc)|alt=func_button}}, the sequence will toggle between numeric and alphabetic when the entity is targeted.
|-
| {{code|+A}} to {{code|+J}}
|-
| {{code|-0}} to {{code|-9}} || Random tiling || Each time the map loads, the engine will randomly assign one of the textures in this set to each appropriate surface. In [[software mode]], the texture changes at the edges of the texture, whereas in [[OpenGL]] mode, the texture changes at the edges of the geometry it sits on.
{{tip|This feature does not work well on surfaces which are not 240x240 texel quads. Consider combining the variations into a larger [[megatexture]] instead.}}
|-
| {{code|@}} || Nonsolid visblocker || Non-solid, but still blocks [[VIS]]. Does not have backface culling.
|-
| {{code|scroll}} || Scrolling || Scrolls horizontally based upon {{ent|func_conveyor (GoldSrc)|alt=func_conveyor}} {{code|speed}} or other entities' {{code|rendercolor}}
|-
| {{code|sky}} || Sky || Not drawn in-game, but tells the engine to render the skybox behind all geometry in the current PVS.
{{bug|In [[OpenGL]] mode's non-multitextured renderer, rendering bugs occur when using multiple {{code|sky}} textures.}}
|-
| {{code|~}} || Self-illuminated (has fullbrights) || {{modernDeprecated|Support removed before release; only functional in Half-Life Alpha 0.52's [[software renderer]]. Nonetheless, the vanilla base game textures are still properly formatted for this feature.}}
The last 32 colors in the [[palette]] are supposed to always be rendered at full brightness, regardless of lightmap brightness and rendermode.<br>Unlike other prefixes, this prefix can be used in conjunction with the animated/toggled texture prefix (ex {{code|+0~}}).
|}

== See also ==
* [[Tool textures (GoldSrc)]]

[[Category:GoldSrc Textures]]