Search found 3434 matches

by Dade
Thu May 14, 2020 5:40 pm
Forum: User Support
Topic: render freezes while opencl kernels are being compiled, luxcore v2.3
Replies: 10
Views: 371

Re: render freezes while opencl kernels are being compiled, luxcore v2.3

by freeze I mean that nothing happens, and I have to shut down blender since it does not respont. The computer DOES NOT get stuck. I can still use the mouse, surf the internet, etc. usually the renderer stops on "compiling kernels" for about 1 min. max. now it takes 20 min. and still counting (does...
by Dade
Thu May 14, 2020 4:05 pm
Forum: User Support
Topic: Relative Refraction vs. Absolute Retraction Index
Replies: 5
Views: 153

Re: Relative Refraction vs. Absolute Retraction Index

How do you recommend treating the material for a bubble in the liquid? Adding a sphere with a glass material and a IOR of 1? Yes, it should work fine. Just use appropriate priorities so the bubble "wins" over the liquid volume. Let me finish by saying that I am thoroughly enjoying Luxcore and Blend...
by Dade
Thu May 14, 2020 4:01 pm
Forum: User Support
Topic: render freezes while opencl kernels are being compiled, luxcore v2.3
Replies: 10
Views: 371

Re: render freezes while opencl kernels are being compiled, luxcore v2.3

For "freeze" do you mean you have to reset the PC ? Or it is a slowdown and than everything works fine after a while ?
by Dade
Thu May 14, 2020 2:17 pm
Forum: User Support
Topic: Relative Refraction vs. Absolute Retraction Index
Replies: 5
Views: 153

Re: Relative Refraction vs. Absolute Retraction Index

B.Y.O.B. wrote:
Thu May 14, 2020 1:09 pm
In LuxCore you do not have to do this math by hand.
Yes, just use IOR relative to vacuum and LuxCore takes care of the rest (including the case of two no-vacuum volumes).
by Dade
Wed May 13, 2020 10:20 pm
Forum: User Support
Topic: GPU rendering slower than CPU rendering
Replies: 18
Views: 289

Re: v2.3 Vs v2.4 performance

I find the same very strange behaviour with TAO's scene, i.e. GPU is very slow, with LuxCoreUI 2.2 (but 2.4 is ok). This line in the config file seems to be the source of the problem, at least on my laptop: opencl.gpu.workgroup.size = "0" If I comment it, then GPU speed is again very high. "0" mean...
by Dade
Wed May 13, 2020 10:18 pm
Forum: User Support
Topic: Opencl clenqueuwritebuffer bug
Replies: 3
Views: 178

Re: Opencl clenqueuwritebuffer bug

I also get this error, but when this happens, the computer needs a reboot. After a reboot here it works - if the GPU Memory is large enough. Here its like that, that even a restart of Blender will not fix the problem. Only a restart of the computer will fix the problem. This really sounds more like...
by Dade
Wed May 13, 2020 8:02 am
Forum: User Support
Topic: Caustics strange behavior with big objects
Replies: 6
Views: 217

Re: Caustics strange behavior with big objects

I have found that luxcore doesn't create proper caustics effects when I add the landscape geometry in my scene. I've notice that the calculations "disipates" when the geometry gets bigger. I've checked it creating a plane and while I scale it, this issue happens. This is somewhat expected because, ...
by Dade
Tue May 12, 2020 10:09 pm
Forum: User Support
Topic: Physically based light measurement
Replies: 6
Views: 306

Re: Physically based light measurement

Lummy wrote:
Tue May 12, 2020 9:34 pm
Thank you. My problem was that there is no irradiance contours available in the caustic part of the render.
Yes, irradiance AOV uses only eye path samples (while light paths are the one most likely used to render caustics).
by Dade
Mon May 11, 2020 11:19 pm
Forum: User Support
Topic: The flickerfree animation challenge
Replies: 47
Views: 1595

Re: The flickerfree animation challenge

After rendering first with auto setting the calculated luminance would be saved and shown in the UI (similar to suggested clamping value in BlendLuxCore). Screen Shot.png If it looks ok I switch to manual and use the saved value persistently for all further renderings such as of an animation. Lumin...
by Dade
Mon May 11, 2020 8:25 pm
Forum: User Support
Topic: The flickerfree animation challenge
Replies: 47
Views: 1595

Re: The flickerfree animation challenge

epilectrolytics wrote:
Mon May 11, 2020 8:08 pm
I have now rendered the scene with latest build and HDRI
I asked to render without HDR :?:
epilectrolytics wrote:
Mon May 11, 2020 8:08 pm
Why not introduce a manual setting for the average luminance?
Eh ? Do you know in advance the luminance of an image yet to render ?