LuxCoreRender Forums

Is bump mapping not supposed to work with glossy translucent material? Seems the moment I plugin bump map to glossy translucent the shader looses translucency

bump off: bump on:

I confirm lacilaci's finding, that Glossy Translucent doesn't work together with bump maps.
It works with the June 26 version of LuxCore, but does not with the Aug 8 version.
Matte Translucent is equally affected.

It can be reproduced with example scene Procedural Leaves:
https://github.com/LuxCoreRender/LuxCor ... Leaves.zip

Do you have a simpler test scene ? Something with a plane and a simple bump map image.

I'm looking into the linked scene but it is a complex material setup, if I replace glossy translucent with just matte, I still get an odd result:


The black leaf looks like something with flipped normals. I need a simpler set up.

I'll make a small example scene tomorrow..

Why this ain't OK
test scene "ProcedurelLeaves"

Dade wrote: ↑Thu Aug 22, 2019 3:46 pm The black leaf looks like something with flipped normals. I need a simpler set up.

The three leaves share the same mesh data and the "black" one is scaled -1 on one axis to produce more variability.

You could just delete that one.

(I'm away from my computer at the moment, but will be back soon, and make a simple scene if still needed.)

provisory wrote: ↑Thu Aug 22, 2019 4:52 pm

Dade wrote: ↑Thu Aug 22, 2019 3:46 pm The black leaf looks like something with flipped normals. I need a simpler set up.

The three leaves share the same mesh data and the "black" one is scaled -1 on one axis to produce more variability.

You could just delete that one.

(I'm away from my computer at the moment, but will be back soon, and make a simple scene if still needed.)

This may be a big hint on where is the problem (-1 scale) but it would be a lot easier to investigate with a simpler scene.

Dade wrote: ↑Thu Aug 22, 2019 5:15 pm ...it would be a lot easier to investigate with a simpler scene.

Here is a simple test scene.

Oh, I see - Bump output "kills" Translucency

provisory wrote: ↑Thu Aug 22, 2019 5:47 pm

Dade wrote: ↑Thu Aug 22, 2019 5:15 pm ...it would be a lot easier to investigate with a simpler scene.

Here is a simple test scene.

I get this rendering with glossy translucent:


and this with matte:


where is the problem in glossy translucent ?