Hello,

(Please note: I have also asked this on the FreeCAD forum but didn't get any responses...)

I am posting here as I believe this is a bug in the render workbench but am happy to be told otherwise...

I have previously successfully rendered an assembly4 model using the render workbench with cycles:

I now have a new assembly4 model and am unable to get it to render correctly:

As you can see the bottom half of the model is not rendered at all, the base doesn't exist and the background is black.

I have double checked all of the render settings and model links etc. but I cannot see what is the difference between my two models which is causing this issue.

I have updated to the latest version of the Assembly4 and Render workbenches.

Does anyone have any suggestions or insight as to what could be going wrong?

Alternatively, any tips on how I could debug this myself?

I have made available the 2 assembly models here:

https://f001.backblazeb2.com/file/vectronic-public/freecad/render-working.zip (main model file: brick_assembly.FCStd)

https://f001.backblazeb2.com/file/vectronic-public/freecad/render-broken.zip (main model file: brick_assembly_2.FCStd)

Thanks very much,
Nick