Search found 297 matches

by CodeHD
Sat May 04, 2019 4:24 pm
Forum: User Support
Topic: Swimming pool / Underwater / Caustics
Replies: 43
Views: 5434

Re: Swimming pool / Underwater / Caustics

I still have to play around with BiDirVM, but I did play around a bit more with waves, this time using a plane with "dynamic paint" instead of fluid. I osciallted a ball (with Null material for the rendering) inside it to create waves. I also made a version with two balls to get interference, which ...
by CodeHD
Fri May 03, 2019 8:52 am
Forum: User Support
Topic: Swimming pool / Underwater / Caustics
Replies: 43
Views: 5434

Re: Swimming pool / Underwater / Caustics

This inspired me to play around with blenders fluid and the caustics cache and get some own expereince :) You can find an animation here: https://owncloud.gwdg.de/index.php/s/ga5sP1BOBvk5QIh Took me about 8 hours to render 240 frames. Cache build about 1 minute for each frame. Rendered to 20 Samples...
by CodeHD
Thu May 02, 2019 4:51 pm
Forum: Development
Topic: Material/Texture rework in v2.4
Replies: 38
Views: 7787

Re: Material/Texture rework in v2.3

if we are talking about properties read from file, i would add BRDF/BSDF-data from a file to get realistic (also anisotropic) matte/glossy mixtures. Although I believe that not many people will even have such data available, so it will be a corner case...
by CodeHD
Thu May 02, 2019 9:48 am
Forum: Development
Topic: Tiled OIDN Denoising
Replies: 78
Views: 13857

Re: Tiled OIDN Denoising

Done. https://github.com/CodeFHD/LuxCore/blob/master/src/slg/film/imagepipeline/plugins/intel_oidn.cpp https://github.com/CodeFHD/LuxCore/blob/master/include/slg/film/imagepipeline/plugins/intel_oidn.h https://github.com/CodeFHD/LuxCore/blob/master/src/slg/film/filmparse.cpp I have included another ...
by CodeHD
Wed May 01, 2019 8:55 pm
Forum: Works in Progress
Topic: Menger Sponge
Replies: 14
Views: 2602

Re: Menger Bunker #2

...aaand now it's here and it works great! Rendered 300 frame animation of the bunker scene in 25h including 90 (!) min cache building. Then used DaVinci Resolve to retime into 1200 frames for 24 x 50/s. The DaVinci optical flow algorithm has problems with the concrete texture, probably I should ha...
by CodeHD
Wed May 01, 2019 9:08 am
Forum: General Discussion
Topic: How do you find a bug in a 3D renderer?
Replies: 3
Views: 850

Re: How do you find a bug in a 3D renderer?

I can give you a practical example from my current work on implementing the tiled OIDN (see this post. ) There I have regions of the image which are computed as an overlap from two stripes, one of which appears to be wrong, but I don't know immediately which. I then comment-out one of the overlap te...
by CodeHD
Tue Apr 30, 2019 9:29 pm
Forum: Development
Topic: Tiled OIDN Denoising
Replies: 78
Views: 13857

Re: Tiled OIDN Denoising

Just a little update to end the day: I have now written the code for tiled denoising, but I will have to go through the same procedure as for the stripe-code, i.e. find my errors with the buffer array indexing. Apparently something is going quite wrong at the moment as you can see in the following e...
by CodeHD
Mon Apr 29, 2019 5:01 pm
Forum: User Support
Topic: Swimming pool / Underwater / Caustics
Replies: 43
Views: 5434

Re: Swimming pool / Underwater / Caustics

but on my reference photo the caustics are also reflected which makes the green brighter. Aaaah yes, I didn't spot that! This is because that would be an SDS path (specular-diffuse-specular, here refraction on the water surface, diffuse pool wall and specular reflection on the water surface), which...
by CodeHD
Mon Apr 29, 2019 10:02 am
Forum: User Support
Topic: Swimming pool / Underwater / Caustics
Replies: 43
Views: 5434

Re: Swimming pool / Underwater / Caustics

Hi and welcome to the forum :D I have to say first that the image already looks very nice to me :) It is usually a good idea to post a blender scene file with your questions so that others can investigate your problem in detail. Am I right to assume that you have set up a pool of water and your came...
by CodeHD
Mon Apr 29, 2019 9:52 am
Forum: User Support
Topic: Issues with Sun and Distant light
Replies: 8
Views: 1416

Re: Issues with Sun and Distant light

This is a numerical precision problem. If you check the code: https://github.com/LuxCoreRender/LuxCore/blob/a1a2c54dd4c873eebd70a617717ee04c42d3ffde/src/slg/lights/sunlight.cpp#L40 [...] Short version: relative size was never intended to be used for values <1.0 so I'm now capping the value to be al...