[Bf-cycles] Cycles Standalone - tangent space normal map

[Mohamed Sakr]

I faced the same problem within Cycles 4D integration, problem is Cinema4D
is Y axis up (left handed coordinate system) and Blender is Z axis up
(right handed coordinate system), I guess you already use Mikk tangent
space to generate tangent data.
what I did to solve this: in mikk_set_tangent_space , I use -ve sign, not a
perfect solution, you will find significant bugs in vector displacement
node for example (even with +ve sign).

On Mon, Feb 18, 2019 at 9:26 AM Prayaag Kasundra <prayaag at decorastudio.com>
wrote:

> Hello all,
>
> We were trying to setup glTF PBR workflow using principled_bsdf in our
> Cycles Standalone integration. Everything is fine. The only problem is if
> we use normal_map node with tangent space, mesh turns black. We were
> testing using standard glTF model named Boombox from glTF repo.
>
> I read that if subdivision modifier is there then tangent space normal map
> will make it black. But that's not the case in our cycles standalone
> integration. (We even tried with interpolation="flat" on mesh node if
> smooth subdivision could be an issue).
>
> Thanks,
> Prayaag
>
> _______________________________________________
> Bf-cycles mailing list
> Bf-cycles at blender.org
> https://lists.blender.org/mailman/listinfo/bf-cycles
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.blender.org/pipermail/bf-cycles/attachments/20190218/b03631c6/attachment.html>