Re-learning Maya FX systems

Inspired by the motion design trend to use effects systems to create some visuals :)

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How to use MASH color node in Arnold

MASH’s color node is based on the color per vertex of Maya’s particle system and can display nicely in the viewport but it’ll take a couple steps for it to appear in a software render of your choice. One, to export the vertex colors from the shape node of the reproMesh, and then to assign a utility node for your renderer to read the vertex color information.

Here’s how to do it for Arnold:
1.1 Under the ReproMeshShape node attributes tab:
1.2 Check “Export Vertex Colors”
colorPerVertex MASH to Arnold

2.1 Assign an Arnold shader
2.2 Click on the “checkerbox” on the Color channel under the Diffuse tab
2.3 Choose the Arnold utility shader node “aiUserDataColor” in the “Create Render Node” pop-up
colorPerVertex MASH to Arnold

3.1 Under the “aiUserDataColor” attributes tab
3.2 Type in “colorSet” in the “Color Attr Name” field
colorPerVertex MASH to Arnold

That’s all! Hope that helps!