Search found 139 matches

by lighting_freak
Mon Jun 24, 2019 5:19 am
Forum: Development
Topic: Hybrid Back/Forward path tracing (aka BiDir without MIS)
Replies: 52
Views: 663

Re: Hybrid Back/Forward path tracing (aka BiDir without MIS)

Hi all, Thanks for enabling this options. It sounds totally reasonable to combine this two algorithms to speed up rendering. Does the hybrid rendering concept keep the physics base? Is energy conservation given during the rendering process? Does the hybrid option allow light paths meeting somewhere ...
by lighting_freak
Sat Jun 22, 2019 10:41 am
Forum: User Support
Topic: Node setup for volume absortion
Replies: 2
Views: 141

Re: Node setup for volume absortion

Hi,

OK for me... my new request is to transmit 99.8% yellowish light per mm! :D
I'm really not sure how top define such a blendluxcore-node. Thanks for your help.

BR
by lighting_freak
Wed Jun 19, 2019 4:32 pm
Forum: User Support
Topic: Node setup for volume absortion
Replies: 2
Views: 141

Node setup for volume absortion

Hi all, I want to create a glass material with polished surfaces and a volume that absorbs blue light. I know the absorption coefficient by wavelength. Is it possible to transfer these in luxcorerender? If not, is there a simplification possible that allows me to absorp 0.2% of blue light per mm? Wh...
by lighting_freak
Tue May 07, 2019 8:12 pm
Forum: User Support
Topic: CIE 171:2006
Replies: 8
Views: 498

Re: CIE 171:2006

Hi, This is belonging report for Nvidia's iray: Validation of NVIDIA's Iray against CIE 171_20160217.zip Wouldn't it be nice to place an information like in this commercial raytracer on luxcorerender webpage? https://www.optis-world.com/Showcase/News-Release/Corporate-Information/A-world-first-SPEOS...
by lighting_freak
Mon May 06, 2019 11:49 am
Forum: User Support
Topic: CIE 171:2006
Replies: 8
Views: 498

Re: CIE 171:2006

Hello all, Look like there is an error here 2.1 cm instead of 2.1mm radius : thanks for first notification. Unfortunatly its only a typo in the report and the blender setting is right. It should be 2,1cm. Never the less the main critical point is the calculation using an IES file... As soon as we've...
by lighting_freak
Mon May 06, 2019 10:04 am
Forum: User Support
Topic: CIE 171:2006
Replies: 8
Views: 498

Re: CIE 171:2006

Hi, I've just finished my first attempt for the first (out of 12 or more) test cases. If my process is correct, there seems to be a serious issue with working with IES files. Please have a look into the attached documentation and the corresponding blend files. I'm happy for every oppinion and every ...
by lighting_freak
Thu May 02, 2019 4:38 pm
Forum: Development
Topic: Material/Texture rework in v2.3
Replies: 22
Views: 1402

Re: Material/Texture rework in v2.3

Hi, My wish for materials/volume nodes would be a way to define them more physics based. Old lux was able to read spectral absorption curves for volume colour. Also refractive indices curves for dispersion were possible... How is about integration of physics based scattering models like (Heyney Gree...
by lighting_freak
Tue Apr 30, 2019 2:54 pm
Forum: User Support
Topic: Swimming pool / Underwater / Caustics
Replies: 43
Views: 2013

Re: Swimming pool / Underwater / Caustics

Hi all, One more question from my side. You said SDS paths are impossible to render with BiDir... But is it really impossible or just hard to render? I'm wondering because the images look quite good, what are you missing? Physics based render is always connected to some patience... remembering older...
by lighting_freak
Fri Apr 26, 2019 7:43 pm
Forum: User Support
Topic: CIE 171:2006
Replies: 8
Views: 498

Re: CIE 171:2006

Hi, I bought the document, but I think I'm not allowed to share it. It mentions a range of test cases that should compare the calculated/simulated results with some analytical and measured values. Within the next days I'll gonna try to run through each of the tests with luxcorerender... Are you inte...
by lighting_freak
Thu Apr 25, 2019 6:14 am
Forum: User Support
Topic: CIE 171:2006
Replies: 8
Views: 498

Re: CIE 171:2006

Yes, that's why I was hoping that someone knows about its content already.