Search found 202 matches

by lighting_freak
Fri Oct 23, 2020 5:32 am
Forum: User Support
Topic: spectral rendering
Replies: 58
Views: 3176

Re: spectral rendering

Hi, If one coniders scientists and engineers, you have to have a clear idea what features you would offer them (and advertise as such). I really have a clear idea... I'd like to have a photometric real world visualisation, using physics based light sources that interacts with physics based surfaces ...
by lighting_freak
Thu Oct 22, 2020 4:45 am
Forum: User Support
Topic: spectral rendering
Replies: 58
Views: 3176

Re: spectral rendering

Hello, Rolls Royce I don't think that the parameters are to complicated. They in some cases just different. If you really like to remodel real world behaviour you'd probably need even more parameters. The question is where does luxcore want to go to? Does it like to be a cycles clone, or does it lik...
by lighting_freak
Mon Oct 19, 2020 5:27 am
Forum: User Support
Topic: spectral rendering
Replies: 58
Views: 3176

Re: spectral rendering

Hello all, I totally appreciate the discussion about spectral renderings. I agree to all of your pros and cons... my latest thread could point to one more situation that seems to be limited to current RGB solution. https://forums.luxcorerender.org/viewtopic.php?f=4&t=2678 I would like to see a "scie...
by lighting_freak
Thu Oct 08, 2020 5:39 pm
Forum: User Support
Topic: Glass with multiple materials assigned
Replies: 9
Views: 968

Re: Glass with multiple materials assigned

Hi CodeHD,

Does the solution of FarbigeWelt solve your issue? Does it meet your expectations?

BR
by lighting_freak
Thu Oct 08, 2020 1:27 pm
Forum: User Support
Topic: Setup of a special material and emission situation
Replies: 2
Views: 167

Setup of a special material and emission situation

Hello all, I'd like to create a special material combination. It is a special red acrylic that allows also a special yellow light to come through it and still looking yellow. The following image shows the absorption of the red acrylic and the spectrum of the light source. Material_VS_Emssion.jpg Is ...
by lighting_freak
Tue Sep 22, 2020 12:46 pm
Forum: User Support
Topic: Glass with multiple materials assigned
Replies: 9
Views: 968

Re: Glass with multiple materials assigned

Hello,

does this setup behave like you'd desired it?
forvideo.blend
(3.48 MiB) Downloaded 19 times
untitled.jpg
BR
by lighting_freak
Thu Jul 23, 2020 2:16 pm
Forum: User Support
Topic: Angular roughness/Angular glossiness
Replies: 22
Views: 2219

Re: Angular roughness/Angular glossiness

lighting_freak wrote:
Mon Jul 20, 2020 3:44 pm
Might be the right time to introduce kind of brdf node that allows to define the portion of scattering types (matte, glossy, specular) per incidence angle. Ideally with some optional interpolation types (e.g. linear, exponential etc) between those points.
maybe like this?
maybe like this?
by lighting_freak
Mon Jul 20, 2020 3:44 pm
Forum: User Support
Topic: Angular roughness/Angular glossiness
Replies: 22
Views: 2219

Re: Angular roughness/Angular glossiness

Hi,

Might be the right time to introduce kind of brdf node that allows to define the portion of scattering types (matte, glossy, specular) per incidence angle. Ideally with some optional interpolation types (e.g. linear, exponential etc) between those points.

What do you think?

BR
by lighting_freak
Wed Jul 15, 2020 4:41 am
Forum: User Support
Topic: Volume absorption definition
Replies: 1
Views: 291

Volume absorption definition

Hi all, From measurements I know the exact transmission of some different coloured clear materials. Due to having this measurement with different thicknesses I'm able to calculate the absorption coefficient. In old luxrender it was possible to transfer this absorption coefficient to the render engin...
by lighting_freak
Wed Jul 15, 2020 4:14 am
Forum: User Support
Topic: Angular roughness/Angular glossiness
Replies: 22
Views: 2219

Re: Angular roughness/Angular glossiness

Hi,

But if you select a static color instead of IOR the angular dependency is lost, isn't it?

BR