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The uberbitmap does not reload when saving over a file. Making a new node doesn't help. Is there any way to force it to reload?
Where do you checking that?
Mat. Editor, viewport or offline rendering?
Looks like Arnold hardest holding on cache.
To the point where only loading other file helps - so load copy of that bitmap.
You can only trust on what you see in Material sample (by default locked to current renderer)
All other loaders and places can show updated image/material.
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