Search found 219 matches

by lighting_freak
Wed Jul 01, 2020 5:13 am
Forum: Computer Graphic News
Topic: parallax mapping Fstorm
Replies: 15
Views: 6268

Re: parallax mapping Fstorm

Hello,
lacilaci wrote:
Thu Jun 25, 2020 10:50 am
Don't get me wrong.. I don't care about bidir
BiDir is still the only engine that seems to be able to manage complicated light paths...
Bidir isn't often used so it is not a lost
I guess is often used by people that care about the physics based realism.
by lighting_freak
Tue Jun 30, 2020 4:35 am
Forum: User Support
Topic: Reducing roughness by value
Replies: 6
Views: 1441

Re: Reducing roughness by value

Hi,

Thanks for your help.
This one is a good question too.
I had some troubles in the past as well:
Fox wrote:
Thu Jun 25, 2020 11:56 am
Are there any other FP32 limitations for volume absorption in small scale rendering, like jewelry?
BR
by lighting_freak
Fri Jun 26, 2020 4:20 pm
Forum: User Support
Topic: export IES file from Luzrender
Replies: 4
Views: 1198

Re: export IES file from Luzrender

Hi,

I would be interested in such a tool as well.

Could you please be a little more specific how you might get some [cd] values from luxcorerender?

BR
by lighting_freak
Thu Jun 25, 2020 9:24 am
Forum: User Support
Topic: Reducing roughness by value
Replies: 6
Views: 1441

Reducing roughness by value

Hello all,

what happens if I reduce the roughness value (limit with direct entry is 0,001) with the help of an value node?
roughness.jpg
Is it possible to reach lower roughness values with this trick?
Thank you.

BR
by lighting_freak
Fri Jun 19, 2020 12:22 pm
Forum: User Support
Topic: LuxRender vs LuxCoreRender (Prism Scene)
Replies: 12
Views: 2497

Re: LuxRender vs LuxCoreRender (Prism Scene)

Hello all,

I made a small scene with luxcorerender and everythings seems to work fine:
prism.jpg
BR
by lighting_freak
Wed Jun 03, 2020 11:01 am
Forum: User Support
Topic: reflectivity on a black material covered with a clear one
Replies: 15
Views: 3449

Re: reflectivity on a black material covered with a clear one

Hello, Question a: I'll gonna try to organize some measurement of this situation. Maybe we could clear that up... Question b: There should be no recognizable transmission of the black material. So no SSS is expected for this type of analysis. In fact you might be right in pointing out that some SSS ...
by lighting_freak
Tue Jun 02, 2020 11:12 am
Forum: User Support
Topic: reflectivity on a black material covered with a clear one
Replies: 15
Views: 3449

Re: reflectivity on a black material covered with a clear one

Hi, thank you for the file, very impressive, and very well visible interaction. Now, since I see that I could get everything, I'd like to know what's the truth... ... I did already a little web research but I didn't find anything useful. Is, by coincidence, someone there who know abut the real world...
by lighting_freak
Fri May 29, 2020 8:11 pm
Forum: User Support
Topic: reflectivity on a black material covered with a clear one
Replies: 15
Views: 3449

Re: reflectivity on a black material covered with a clear one

I know about the round about 4% from first surface. That is true and right. According to Dade's answer there will be another 5% of specular/glossy from interaction with black material. That's how luxcore treat this situation. This are my thoughts: Having two clear materials connected by an intermedi...
by lighting_freak
Fri May 29, 2020 5:22 pm
Forum: User Support
Topic: reflectivity on a black material covered with a clear one
Replies: 15
Views: 3449

Re: reflectivity on a black material covered with a clear one

Hello, The more I think about this, the more it pops up that really don't know what should happen in real world on such an intermediate surface... For sure the amount of direct/specular reflected light is reduced but by how much and what are the physics behind? What happens to the diffuse scattered ...
by lighting_freak
Fri May 29, 2020 2:36 pm
Forum: User Support
Topic: reflectivity on a black material covered with a clear one
Replies: 15
Views: 3449

Re: reflectivity on a black material covered with a clear one

Hello, That is more or less the answer I was looking for. The glossy IOR has nothing to do with volumes Lets modify your example. I have a black table top covered with water (really no air gap between). The touching surface is shared by the water medium and by the table top. In the end if you have t...