SRB2-Shader-Guide.md

@@ -43,7 +43,7 @@ The shaders have access to the following uniform variables:
 - `float lighting`: The light level of the surface. Ranges from 0 to 255.
 - `float fade_start`: The start of the light fade in the colormap. Ranges from 0 to 31.
 - `float fade_end`: The end of the light fade in the colormap. Ranges from 0 to 31.
-- `float leveltime`: The time in the level. Increments by 1 for each tic.
+- `float leveltime`: The time in the level. Measured in seconds.
 
 ### Shader compatibility and errors