LuxCoreRender Forums

Thanks for the reply. the sum of a "perfect" glass is 2 I understand that there is a loss (neither transmitted nor reflected but absorbed at the surface). But transmitted plus reflected cannot be higher than 100%. The max for kt and kr is 1. Lets assume a loss of zero, for 20% reflected an...

Please let me verify my understanding/assumptions on the material and volume parameters: kt and kr define how much of the light is reflected and how much in transmitted through the irradiated surface. So I expect the two to sum up to 1. (100%) per color channel. But isn't this ratio depending on the...

Thanks. I think I've a reasonable understanding now.

So even for simple homogenous geometries like spheres there is now way around fine meshes to get precise results for refraction (not for the object itself), right?

So what is the effect of normals on refraction then. They just define which IOR to use for which side of the face? Or is there more like e.g. interpolating angle?

I achieved promising results with lenses made of quite fine meshes, and normals interpolated from face normals. Now I want to optimize precision and performance. I need validate my understanding of normals. My understanding is that (with BIDIRCPU) luxcore takes the normals to bend/curve faces to cal...

BIDIRCPU is the only engine capable to render realistic refraction, right? In contrast to e.g. PATHCPU with BIDIRCPU an IRRADIANCE output is just zeros. Is there a way to correct this? Or can I at least get and RGB_IMAGEPIPELINE output into a buffer? If I try so with GetOutputUInt() then I get: Runt...

I think that was the solution! It changed the picture completely. Great

I'm going to check the details.

Thanks a lot.

The forum does not allow to upload ply files.
I included the cfg, scn and ply files in the github repository, which B.Y.O.B. requested.

Question: Why isn't there any effect of refraction visible on the projection plane?

Here the link to the github project with the test code:
https://github.com/ujikol/pyluxcore_test

Yes, I set IORs. scene.volumes.vol_air.type = homogeneous scene.volumes.vol_air.multiscattering = 0 scene.volumes.vol_air.scattering = 0.001 0.001 0.001 scene.volumes.vol_air.absorption = 0. 0. 0. scene.volumes.vol_air.asymmetry = 0.0 0.0 0.0 scene.world.volume.default = vol_air props.Set(pyluxcore....