Roman Demaev

robsdesign
If you are using Mantra: Go to the render tab on the fire geometry. On Render Visibility, either type -primary or use the drop down "Invisible to Primary Rays (Phantom)"
If you are using Redshift: Go to Redshift OBJ>Visibility tab on the fire geometry and uncheck "Primary Ray Visible".
If you are using something else: I don't know.

Forgot to mention, I use Mantra.
Perhaps I did not put it correctly, I need the light created by the fire to be moved to the background, but the grid should not be visible.

Hi all. I'm just getting started in Houdini and this is my first scene and I've been working on it for two months now. Now I've got to the lighting and shadows and I can't solve the problem with the light in my scene. It seems that the solution should be obvious, but I do not understand in which direction I should move.
How to cast shadows and light (from the explosion) into the background? Do I understand correctly that you need to create a surface and create a shader for it? Or is it done in another way?
If this is done with a shader, then how to create a shader in such a way that the object becomes invisible, but casts shadows and reflections?