LuxCoreRender Forums

Dade wrote: ↑Tue Dec 29, 2020 5:18 pm Sharlybg, you have probably not set the exterior volume of all objects involved.

I went ahead and added homogeneous external volume to all materials in the scene and I still don't see scattering below the mirror.

Thank you. However, I forgot to mention in my previous post that the scattering should also be visible after the mirror. In your render, it is missing, whereas in the first post it is present.

Thanks for your offer to help. The original image in this thread, made with "bidir", shows a beam being scattered as it travels through the volume (good). It is missing reflections in the mirrors (bad) as shown in the annotations. Switching to "path" I can see the reflections in ...

Dade, can you offer any further help? Can I somehow get volume scattering with path engine? I need the path engine for SDS but would also like to get volume scattering.

Also, in case it is useful or relevant - in the github issue you linked https://github.com/LuxCoreRender/LuxCore/issues/485#issuecomment-745247191 , the sample code is using the bidir engine, which won't work for me due to my need for SDS (see the first posts in this topic). I have a similar problem...

Thank you once again. However, despite playing around with your suggestion for several minutes, I still can't get this to work. I had previously set the world volume to have homogeneous scattering. (That's how the beam was showing in the first and second images.) Now I deleted the the world volume a...

Thanks for the quick answer. If I use the PhotonGI cache and normal paths (not bidir) I get a different problem - I do not see any scattering from the volume (which is weakly scattering) immediately after the area source but before the narrow beam bounces off the mirror. I am attaching an image show...

Hi, I'm trying to render a light spot where the light spot is created by a narrow-angle area light shining through a mirror. I can see the light spot directly with the camera. However, the light spot is not visible through the mirror which bounces the beam from the area light, nor is it visible thro...