[SD] Does environment channel work at all? (Workarounds)

bitinn

First of all, I am not asking about environment map + IBL, I know that works.

I am asking about this (from the Blinn shader):



This environment channel is linked to output node tagged with environment usage:



And it's sampled here, but this won't work right with a simple NxN texture:





Problem, the cubemap is past as-is, that's NOT how cubemap works in OpenGL. Whatever I pass (cubemap, HDR environment, simple gradient), only one face will be loaded and only one face will show up in reflection.



So, does SD environment channel actually works? I don't think so.

Reason I need this: I am doing some stylized NPR texturing, I needed this reflection to work (pure ambient color isn't enough for my case, PBR + IBL isn't what I am looking for).

(Of course I could go in and modify the whole shader but the problem took place at the way environment texture is loaded, so my workaround will involve not using samplerCube)

bitinn

Alright, after a few tries I decided to dump the samplerCube solution all together, and create a custom Blinn solution using IBL's samplePanoramicLOD instead. So far so good:

 





Hope this helps someone in the future.

poopipe

I seem to recall a bug with this being reported in another thread in this section recently. 

oblomov

Indeed, the conversion from lattitude-longitude panorama to cubemaps is currently broken in SD on some macs (it seems like it runs out of video memory and only manages to convert one face of the cubemap). We're working on a fix but meanwhile, you can indeed work around it by using directly the Lat/Long environment map.