Emmanuel,
I found a little bug, that I can't replicate easily. I made a composite object, then attached a texture, then decided I didn't like the texture, so I hit Undo. Instead of returning to the previous colour (red), the model returned to white, even though the red colour is still in the settings.
The SH3D-file is here .
EDIT
To make it easier for you to find the bug: when reloading the file the colour returned to red, of course!
Hans
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Hans
Ryzen 7-9700X, 32 GB RAM, 500 GB SSD, 2x 2 TB SSD, Geforce GTX 1060 3 GB
