Vertex-color blending

DirectX example for Max 2026 and earlier

This example writes the result to a DirectX material with sgsdk_ConnectOutputToDirectXMaterial. Autodesk removed the DirectX material model from Max 2027, so the example is valid only in Max 2026 and earlier.

The following sections contain examples on how to blend colors using vertex-colors. It is recommended to read Shading network concepts before proceeding.

Vertex-color blending using InterpolateNode

This script sets up three vertex color nodes where the last one is used as blend weight. This example is based on the InterpolateNode.

MaxScript

DirectXShader = sgsdk_CreateMaterialMetadata MaterialName

DiffuseTexture1 = sgsdk_CreateShadingTextureNode "DiffuseTexture1"
sgsdk_AddAttributeToNode DiffuseTexture "DiffuseTexture1mapChannel" 3

DiffuseTexture2 = sgsdk_CreateShadingTextureNode "DiffuseTexture2"
sgsdk_AddAttributeToNode DiffuseTexture "DiffuseTexture2mapChannel" 3

BlendColor = sgsdk_CreateShadingVertexColorNode "BlendColor"
sgsdk_VertexColorNodeSetVertexChannel BlendColor 0

InterpolateNode = sgsdk_CreateShadingInterpolateNode "InterpolateNode"
sgsdk_ConnectNodes InterpolateNode 0 DiffuseTexture1
sgsdk_ConnectNodes InterpolateNode 1 DiffuseTexture2
sgsdk_ConnectNodes InterpolateNode 2 BlendColor

sgsdk_ConnectNodeToChannel InterpolateNode DirectXShader "Diffuse"
sgsdk_ConnectOutputToDirectXMaterial effectFile "Diffuse" "DiffuseTexture"

python

from pymxs import runtime as rt

DirectXShader = rt.sgsdk_CreateMaterialMetadata(MaterialName)

DiffuseTexture1 = rt.sgsdk_CreateShadingTextureNode('DiffuseTexture1')
rt.sgsdk_AddAttributeToNode(DiffuseTexture, 'DiffuseTexture1mapChannel', 3)

DiffuseTexture2 = rt.sgsdk_CreateShadingTextureNode('DiffuseTexture2')
rt.sgsdk_AddAttributeToNode(DiffuseTexture, 'DiffuseTexture2mapChannel', 3)

BlendColor = rt.sgsdk_CreateShadingVertexColorNode('BlendColor')
rt.sgsdk_VertexColorNodeSetVertexChannel(BlendColor, 0)

InterpolateNode = rt.sgsdk_CreateShadingInterpolateNode('InterpolateNode')
rt.sgsdk_ConnectNodes(InterpolateNode, 0, DiffuseTexture1)
rt.sgsdk_ConnectNodes(InterpolateNode, 1, DiffuseTexture2)
rt.sgsdk_ConnectNodes(InterpolateNode, 2, BlendColor)

rt.sgsdk_ConnectNodeToChannel(InterpolateNode, DirectXShader, 'Diffuse')
rt.sgsdk_ConnectOutputToDirectXMaterial(effectFile, 'Diffuse', 'DiffuseTexture')