Duplicate skin cluster node will generate multiple bindPose nodes?

[jiajun.coding]

The according command is

cmds.duplicate("XXX_SCL", inputConnections=True)

Works well in most case but it make maya file size grows very large sometimes.

The worst case is from 100MB to 3GB.

In my finding, it will generate multiple bindPose nodes and only one bindPose node will connect to skinCluster? Why there are unused bindPose nodes generated?

Any ideas?

[1925250542]

You can check out this course
https://www.youtube.com/watch?v=4jM2kz2qPQ4&t=13s

[brentmc]

Thanks. I'll pass this on to the team.

[jiajun.coding]

# Too many useless bindPose nodes will cause a large file size and very slow to save in disk.
def removeUselessBindPoses():
    removedAnyBindPose = False

    allDagPoseNodes = cmds.ls(type="dagPose") or []
    for poseNode in allDagPoseNodes:
        if "bindPose" in poseNode:
            connectionNodes = cmds.listConnections(poseNode) or []
            connectionNodes = list(set(connectionNodes))

    isUseful = False
    for connectionNode in connectionNodes:
        if cmds.objectType(connectionNode) == "skinCluster":
            isUseful = True
            break

    if not isUseful:
        cmds.delete(poseNode)
        removedAnyBindPose = True

    return removedAnyBindPose

This is my current solution to remove these generated but seems useless dagPose nodes named "bindPoseXXX".