Expression Map

[im.thatoneguy]

I really would love a map like this:

InputMap1: [Gradient Ramp]
InputMap2: [Noise]

Red = (InputMap2.r-(1-InputMap1.r))*(1000)
Green = (InputMap2.g-(1-InputMap1.g))*(1000)
Blue = (InputMap2.b-(1-InputMap1.b))*(1000)

It would make for simplification of some pretty obnoxiously complex tex composite nodes.

[vlado]

You can always create a GLSL or an OSL shader for this.

Best regards,
Vlado

[im.thatoneguy]

My understanding of the GLSL interface is that you can't address max procedural maps, is that wrong? Can you sample max maps through OSL or GLSL?

[vlado]

My understanding of the GLSL interface is that you can't address max procedural maps, is that wrong? Can you sample max maps through OSL or GLSL?

Of course you can... it would have been pretty limiting to support only bitmaps.

Best regards,
Vlado

[im.thatoneguy]

Marvelous! The best kind of wishlist. The instant gratification wish.

uniform sampler2D noiseMap;
uniform sampler2D gradientMap;
uniform float hardness;

void main() {
vec2 uv_coords = vec2(gl_TexCoord[0]);
vec3 nSample = vec3(texture2D(noiseMap, uv_coords));
vec3 gSample = vec3(texture2D(gradientMap, uv_coords));
vec3 hardMix = ((nSample-(vec3(1.0)-gSample))*(pow(2.0,hardness)));
hardMix = max(hardMix, vec3(0.0));
hardMix = min(hardMix, vec3(1.0));

gl_FragColor = vec4(hardMix,1.0);

}

Radial gradients in screen space as "noise" map and "Falloff: shadow/highlight" as the "Gradient" map.

[vlado]

Supercool Glad it worked out!

Best regards,
Vlado