"<auto>" materials

[pbacot]

I sometimes have materials either created, changed, or added to my material list with the name <auto> and <auto1> etc. Why does this happen? Could it be related to rendering (mostly Thea)? I also have duplicate materials added (mostly for transparent materials), which can be purged or removed with material consolidator (so apparently of no use). How can I avoid either of these?

Thanks.

[Heaps]

Having the same problem.
New model, 4copies each of 3 materials, one is transparent, all relate to a live component window of which I have 3 copies in the model.

Mac OS Mojave 10.14.6
SU 2021 21.0.392

[GD3Design]

I use Vray and have the same problem....so I reckon its a sketchup thing...? Luckily the Vray asset editor makes it easy to do bulk material deletes. But, it is annoying to keep having all these 'auto' materials being made.