Modulate

GIF Animation showing "Modulate" shader in action.

Modulate is a Pixel shader available in all Source games. It modulates the colors of any pixels behind it.

A practical application of this shader is to create bloom-boosting textures, to create fake eye adaptation inside interiors. Other uses include faking various features that Source may not support, such as vertex coloring or lightmapping on models, by creating a surface above the first one to modulate it.

Description

Comparison of bloom boosting with $mod2x 1 + white basetexture and without

Picture showing the difference between $mod2x 0 and 1.

Accepts only the following parameters:

$basetexture <texture>

Multiplies the color behind it with this surface's texture.

$mod2x <boolean>

Use DecalModulate blending instead of multiplication.

Code:Standard multiplication is equivalent to a BlendFunc of [DestinationColor,Zero], and Mod2x is equivalent to a BlendFunc of [DestinationColor, SourceColor]

$nocull <boolean>

Apply effect from through both sides of the polygon, instead of only through the front.

Note:Does not accept any translucency parameters, including $alpha, $alphatest, $additive and $translucent.

See also

• Refract
• Water