PaintBlob

An ice surface using the PaintBlob shader

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PaintBlob is a Pixel shader available in all  Source games since  Portal 2. Originally intended for Gel blobs, it can also be used to create realistic hollow ice surfaces.

Note: $nocull is not needed for this shader to function properly, however, can be used to visualize the $interior effects on the backface.

Todo: Report anomalies and bugs

Bug:Non-functional in   [todo tested in ?]

Supported Parameters

Textures & Masks

$basetexture <texture>

Diffuse texture.

$normalmap <texture>

Normal map.

$envmap <string>

Specular reflection.

$lightwarptexture <texture>

1D ramp texture for tinting scalar diffuse term.

$backsurface <boolean>

Specify that this is the back surface.

Bug:Results in a pixel shader crash if true.  [todo tested in ?]

$specmasktexture <texture>

Mask texture for specular reflection.

$fresnelwarptexture <texture>

1D ramp texture for controlling fresnel falloff

{{MatParamDef|$opacitytexture|texture|text=Typically, a grayscale texture that defines the opaque and translucent parts of the texture.

Outer Layer Parameters

$diffusescale <float>

Scales the output color.

Tip: Can be used to brighten the textures.

$phongexponent and $phonexponent2 <float>

Specular exponent values.

$phongboost and $phongboost2 <float>

Specular boost values.

$rimlightexponent <float>

Rim light exponent.

$rimlightboost <float>

Rim light boost.

$basecolortint <vector3>

Base texture tint.

Todo: Figure out why this doesn't work.

Interior Volume Parameters

$interior <boolean>

Enable interior layer.

$interiorfogstrength <float>

Fog strength (scales with thickness of the interior volume).

$interiorbackgroundboost <float>

Boosts the brightness of bright background pixels.

$interiorambientscale <float>

Scales the ambient light in the interior volume.

$interiorbacklightscale <float>

Scales backlighting in the interior volume.

$interiorrefractstrength <float>

Strength of bumped refract of the background seen through the interior.

Additional Parameters

$uvscale <float>

UV projection scale. Default: 0.02.

$bumpstrength <float>

Bump map strength.

$fresnelbumpstrength <float>

Bump map strength for the fresnel term.

$translucentfresnelminmaxexp <vector3>

Fresnel range parameters for the opacity texture.

$uvprojoffset <vector3>

Center for UV projection.

$bbmin and $bbmax <vector3>

Todo: Functional?

$contactshadows <boolean>

Darkens the shading of the material in areas where it is in contact with a surface.

$bumpframe <integer>

Bump frame.

$alphatest <boolean>

Tip: Has no effect on the alpha, but effects shadow casting

$translucent <boolean>

Tip: Has no effect on the alpha, but effects shadow casting

$surfaceprop <string>

$nocull <boolean>