Problems with textures when rendering

[wofus]

Hello,

I added some models from 3Dwarehouse. The textures of the models are displayed correctly unless I take a 3D photo.
In quality level 1 and 2 it all displayed correctly, in quality level 3 and 4 it depends on coincidence whether the textures are displayed or not.

Photo 1 was rendered in low quality (the way it should look) - always displayed correct
Photo 2-4 was rendered in high quality - displayed textures are always random
Photo 5 was rendered with YafaRay rendering plug-in

Does somebody have the same problems?
Are the 3Dwarehouse models not compatible?

Using a Mac M1 with Rosetta.

[Puybaret]

You must have imported 3D models which are double-faced with different materials (i.e. front and back surfaces are defined using a different material for each surface).
Making invisible their back face materials in the Material modification dialog box of these objects should fix your issue (generally, the material of the back faces can be quite easily guessed from their name and because selecting them in the materials list has no visual effect in the 3D preview).

[wofus]

Thanks a lot for your help and also for your work on the development.