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Thread: Pre and post render python scripting

  1. #1

    Default Pre and post render python scripting

    Hello guys, this is my first post around here, even though I've been following for a couple months now.

    I've been encountering a issue in python scripting in general and that is the reload of the script in pre render operations.

    I have a script that is called inside the maya scripts folder and in the Post Translate Python Script I have:

    import renderOperations

    The weird thing is that when I first render the scene, it doesn't run the operations it should run, only at the second attempt. I discovered around the web that the reload function seems to be a bit buggy, because some people have the same issue.

    Any idea what might cause this? The operations on the script are simple: mesh smooth before render, remove it after.

    Thanks in advance

  2. #2
    while loop
    Join Date
    Feb 2010


    While reload can be weird, we'd probably need to see what exactly is happening in renderOperations to be able to say if it is the cause or not.

  3. #3


    this is the code

    import maya.cmds as mc
    import maya.mel as mel
    import os, sys
    def main():
        mc.prepareRender(edit=True, preRender=preRenderOp)
        mc.prepareRender(edit=True, postRender=postRenderOp)
    def preRenderOp():
        meshes ='mesh')
        for mesh in meshes:
            a = mc.polySmooth(mesh, sdt=2, dv=2)
    def postRenderOp():
        meshes ='mesh')
        for mesh in meshes:
            connections = mc.listConnections(mesh)
            for connection in connections:
                if 'polySmooth' in connection:
                    mc.polySmooth(connection, edit=True, sdt=0, dv=0)         
    The weird thing is that the preRenderOp doesn't run at the first try, but the postRenderOp does...
    Last edited by PoLLuX; 02-21-2017 at 01:58 PM. Reason: new tests


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