如何在Autodesk Maya中通过Python脚本获取V-Ray帧缓存Auto save属性状态？

Hey there! I’ve dealt with this exact problem before when scripting for V-Ray in Maya—those hidden UI settings can be tricky to track down. Let me walk you through how to check that "Auto Save" checkbox in the Frame Buffer's History Settings programmatically:

Step-by-Step Solution #

• First, make sure V-Ray is loaded in Maya (we’ll add a check for that in the code to avoid errors).
• The setting you’re looking for is tied to the VRaySettings node, which holds most of V-Ray’s global configuration. Specifically, the "Auto Save" checkbox maps to the fbHistoryAutoSave attribute.

Python Code Example #

import maya.cmds as cmds

# Ensure V-Ray plugin is loaded
if not cmds.pluginInfo("vrayformaya", query=True, loaded=True):
    cmds.loadPlugin("vrayformaya")

# Grab the V-Ray global settings node (creates it if it doesn't exist)
try:
    vray_settings = cmds.ls(type='VRaySettings')[0]
except IndexError:
    vray_settings = cmds.createNode('VRaySettings')

# Check the Auto Save checkbox status
auto_save_enabled = cmds.getAttr(f"{vray_settings}.fbHistoryAutoSave")

# Print the result (True = checked, False = unchecked)
print(f"Frame Buffer History Auto Save is {'enabled' if auto_save_enabled else 'disabled'}")

Bonus: Modify the Setting #

If you need to toggle the checkbox too, just use setAttr:

# Enable Auto Save
cmds.setAttr(f"{vray_settings}.fbHistoryAutoSave", True)

# Disable Auto Save
cmds.setAttr(f"{vray_settings}.fbHistoryAutoSave", False)

A quick note: V-Ray hides a lot of its UI options behind node attributes instead of dedicated MEL/Python commands, so digging into the VRaySettings node is usually the way to go for these kinds of checks.

内容的提问来源于stack exchange，提问作者winteralfs