Invert bitmap when within a Bump Map slot in RT GPU

[MattClark]

When a bitmap is placed in a bump slot the invert function seems to be ignored by RT GPU.
The invert function seems to work fine on bitmaps for other map slots I've tested.

Thanks,

Matt

[Rens]

Hi, you could try a VRayColor2Bump texture and put your bitmap in there.

[MattClark]

Sure, there's workarounds, just seems like something that it would be nice to work out the box, especially with legacy scenes.

[Rens]

Is it in max? I think that's the way the bump channel in max works, for example it's impossible to use curves on a bump map, it'll adjust only the RGB channels, which is not what max uses for the bump information.

[MattClark]

Yes, in Max. Invert works fine in the Vray production renderer, I guess you want a correlation between that and RT. (Color mapping doesn't work, but invert does.)

[tashko.zashev]

Yes, in Max. Invert works fine in the Vray production renderer, I guess you want a correlation between that and RT. (Color mapping doesn't work, but invert does.)

I can confirm that, the RT CPU and GPU doesn't respect the Invert option changes when the map is added to the Bump slot. I will check if this is limitation or we can implement it for future versions.

[MattClark]

I think it does work in RT CPU, just not GPU.....

[tashko.zashev]

Actually, yes.
On RT CPU it is working fine, we don't fully support it only on GPU. I see a task in our system (RT GPU) about support for the bitmap Output rollout and I'm going to update it.

Thanks for your report.