Transparent 3D Layer Rendering White
I'm rendering an older (1yr old approx) 3D file. The first (ugly) image is when I originally rendered it.
I recoloured part of the layer and re-rendered only to find the empty sections now filled with white.
Ive already done all the material fixes suggested by other threads, however if I'm missing something obvious, any suggestions (even seemingly obvious fixes) would be appreciated.
Before

After

On Windows 10, latest update of PS 22.3.1.
Thanks in advance
