Maya: Bake vertex ao into a specific channel?

EarthQuake · Oct 2013

Does anyone know how to bake vertex ao into a specific channel?

Say I want to bake AO into vertex.r, and reflection occlusion into vertex.g, is there some way to do this?

Maybe if I baked each into two different bake sets, is there some scripting that could be done to copy bakeset 2 into vertex.g of bakeset 1?

Also, anyone know how to render reflection occlusion in Maya? I was thinking I would just try to tweak the AO output a bit.

haiddasalami · Oct 2013

You're probably looking for PolyColorPerVertex You can query each channel and set too.

Some sample code. Note this will probably be slow on higher vertex counts:

import maya.cmds as cmds

sel = cmds.ls(sl=True)
start = cmds.timerX()
for obj in sel:
    totalVerts = cmds.polyEvaluate(obj, vertex=True)
    window = cmds.window("ProgressWindow",title = "Crunching Numbers")
    cmds.columnLayout()
    progressControl = cmds.progressBar(maxValue=totalVerts, width=300)
    cmds.showWindow( window )
    for vertNumber in range(totalVerts):
        vertex = "%s.vtx[%d]" % (obj,vertNumber)
        cmds.polyColorSet(currentColorSet=True, colorSet= 'AO') 
        firstColorSet = cmds.polyColorPerVertex(vertex,query=True,r=True)
        cmds.polyColorSet(currentColorSet=True, colorSet= 'Lights') 
        secondColorSet = cmds.polyColorPerVertex(vertex,query=True,r=True)
        cmds.polyColorSet(currentColorSet=True, colorSet= 'myNewColorSet')
        secondColorSet = cmds.polyColorPerVertex(vertex,r=firstColorSet[0],g=secondColorSet[0],b=0.0)
        myStep = vertNumber/totalVerts
        cmds.progressBar(progressControl, edit=True, pr=vertNumber+1)

totalTime = cmds.timerX(startTime=start)
print ("%d seconds" % (totalTime))

if cmds.window("ProgressWindow", exists=True):
    cmds.deleteUI("ProgressWindow", window=True)

Was about 40 seconds for 2000 vert mesh. Probably derped at some parts as been coding too much maxscript haha. O and yeah this assumes you have a colorset named AO "mynewColorSet" etc. Feel free to change it to whatever

haiddasalami · Oct 2013

Derp. Edited instead of added new.

Maya: Bake vertex ao into a specific channel?

Replies