glossy translucent and bump

Use this forum for general user support and related questions.
Forum rules
Please upload a testscene that allows developers to reproduce the problem, and attach some images.
User avatar
lacilaci
Donor
Donor
Posts: 1969
Joined: Fri May 04, 2018 5:16 am

glossy translucent and bump

Post by lacilaci »

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:
palm_nobump.png
bump on:
palm_bump.png
provisory
Posts: 235
Joined: Wed Aug 01, 2018 4:26 pm

Re: glossy translucent and bump

Post by provisory »

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
User avatar
Dade
Developer
Developer
Posts: 5672
Joined: Mon Dec 04, 2017 8:36 pm
Location: Italy

Re: glossy translucent and bump

Post by Dade »

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:

test.jpg

The black leaf looks like something with flipped normals. I need a simpler set up.
Support LuxCoreRender project with salts and bounties
User avatar
lacilaci
Donor
Donor
Posts: 1969
Joined: Fri May 04, 2018 5:16 am

Re: glossy translucent and bump

Post by lacilaci »

I'll make a small example scene tomorrow..
kintuX
Posts: 809
Joined: Wed Jan 10, 2018 2:37 am

Re: glossy translucent and bump

Post by kintuX »

Why this ain't OK :?
test scene "ProcedurelLeaves"
luxcore bumpy leaf translucent glossy.jpg
provisory
Posts: 235
Joined: Wed Aug 01, 2018 4:26 pm

Re: glossy translucent and bump

Post by provisory »

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.)
User avatar
Dade
Developer
Developer
Posts: 5672
Joined: Mon Dec 04, 2017 8:36 pm
Location: Italy

Re: glossy translucent and bump

Post by Dade »

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.
Support LuxCoreRender project with salts and bounties
provisory
Posts: 235
Joined: Wed Aug 01, 2018 4:26 pm

Re: glossy translucent and bump

Post by provisory »

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.
Attachments
translucent-vs-bump.blend
(2.67 MiB) Downloaded 131 times
Last edited by provisory on Thu Aug 22, 2019 6:02 pm, edited 1 time in total.
kintuX
Posts: 809
Joined: Wed Jan 10, 2018 2:37 am

Re: glossy translucent and bump

Post by kintuX »

Oh, I see - Bump output "kills" Translucency :shock:

Image
User avatar
Dade
Developer
Developer
Posts: 5672
Joined: Mon Dec 04, 2017 8:36 pm
Location: Italy

Re: glossy translucent and bump

Post by Dade »

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:

t.jpg

and this with matte:

m.jpg

where is the problem in glossy translucent ?
Support LuxCoreRender project with salts and bounties
Post Reply