Missing preview image in Material Editor

[Cinemike]

Out of curiosity, is it just me or does the usage of Corona shaders (Normal, AO ...) generally cause to show this symbol rather than a preview in the Material Editor?

C4D R19, Win 10, Corona Beta 1 RC1.

[mrittman]

Yeah, recently I've been seeing this too in the MacOS version.

[Eddoron]

I imagine it being a bit hard to show how the normal with the added bump channel(in the normal) would look like. But if it's not active, there could be a preview.

[Cinemike]

I imagine it being a bit hard to show how the normal with the added bump channel(in the normal) would look like. But if it's not active, there could be a preview.

Even when it is active, I would expect something else to be shown than the "missing texture" icon.

[Eddoron]

I thought about it. Something like the C4D's native material's reflectance channel, where you see another shader ball or two texture previews. that should be possible. One for the Normal and one for the bump. The second shader ball could be a bit heavy and decrease responsiveness, but the two maps, normal frontal projection and side by side, that would be good.