Eunice Panduro avatar image
Eunice Panduro asked ·

Query AOV existence Maya


I'm trying to write a script that makes it easier to create Light AOV's using LPE's (Light Path Expressions). But I just can't find a way to query the existence of previously created AOV's and skip those.

I'm following a tutorial I found from Arvid Schneider so some steps are from his video.

Here is what I have so far:

custAovLst = []
  for lightSel in range(len(LightList)):
     lgt_name = cmds.listRelatives(LightList, shapes = 1)
     aov ='setAttr -type "string" {}.aiAov {};'.format(lgt_name[lightSel], 'lgt_' + lgt_name[lightSel].replace("Shape", ""))

 for light in LightList:
     aovName = cmds.getAttr(light + '.aiAov')

def aovCreate():
     for aovPass in custAovLst:
         if cmds.attributeQuery(aovPass , node = ".aiAov", ex = True):
             lightAov = aovs.AOVInterface().addAOV(aovPass, aovType='rgba')
             aiAov = pmc.PyNode(lightAov.node)
             aiAov.lightPathExpression.set("C.<L.'" + aovPass + "'>.*") 


Any help or advice on how to achieve this or a better way to go on hits is more than welcome!

10 |600 characters needed characters left characters exceeded

Up to 5 attachments (including images) can be used with a maximum of 2.0 MiB each and 9.8 MiB total.

0 Answers

· Write an Answer

Write an Answer

Hint: Notify or tag a user in this post by typing @username.

Up to 5 attachments (including images) can be used with a maximum of 2.0 MiB each and 9.8 MiB total.

Welcome to the Arnold Answers community.

This is the place for Arnold renderer users everywhere to ask and answer rendering questions, and share knowledge about using Arnold, Arnold plugins, workflows and developing tools with Arnold.

If you are a new user to Arnold Answers, please first check out our FAQ and User Guide for more information.

When posting questions, please be sure to select the appropriate Space for your Arnold plugin and include the plugin version you are using.

Please include images, scene and log files whenever possible as this helps the community answer your questions.

Instructions for generating full verbosity log files are available for MtoA, MaxtoA, C4DtoA, HtoA, KtoA, and Kick.

If you are looking for Arnold Documentation and Support please visit the Arnold Support site.

To try Arnold please visit the Arnold Trial page.

Bottom No panel present for this section.