There seems to be an issue with using the layer shader to combine several triplanar maps
I have done several tests and the issue can differ, and restarting everything has no effect. On diffuse, the result is completely black. On the reflection glossiness, details are rendered, but incorrectly, apparently some parts of the maps got inverted.
In either case, the render is not accurate, the material preview is not accurate (matches render), but the preview of each specific channel is correct and as it should render, which only enhances the mystery for me
Can anyone shed any light on this?