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Shadows and reflections on an invisible object


parashutt

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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?

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Edited by parashutt
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On 15.09.2022 at 23:05, doc said:

Если вы используете мантру, вам нужно смотреть на фантомные объекты в вашей мантре. Если вы находитесь в Solaris, я думаю, что LPE - это то, что вам нужно.

If I make an object phantom, then it just disappears along with the shadows and reflection.
If I understand correctly, then phantom objects cast a shadow on other objects, but are not visible themselves. I need a little another.

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