If you have created a custom door panel by "Save as door leaf", then you have no control of the materials of that leaf through the door object settings, even if the override MVO settings is on.
You need to save the door panel with the correct materials in the first place.
Was briefly mentioned here, and I am sure in other posts as well.
https://archicad-talk.graphisoft.com/viewtopic.php?f=6&t=68143&p=302966&hilit=custom+door+leaf+mater...
Barry.
One of the forum moderators.
Versions 6.5 to 27
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