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bilicsko

Rendering light & shadow

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Hi,

I am pretty new to Houdini and I've got a noob question: how can I only render the light and shadow on the ground without the ground?

Thanks a lot,

Máté

campfire_8.jpg

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I'm not sure if this is the proper way to do this. Only works with Raytracing.

VIEWPORT:

image.png.cddb065f573b78867fb5c21eede5d199.png

RENDER:

image.png.94a58055b673d3ce496442b09ffc9413.png

MATERIAL: (for the ground object)

image.png.1d07984fe7cfca2783c79079cb39e0bf.png

FILE:
Houdini 16.0.731 Indie - light_shad_only.zip

Edited by galagast
  • Thanks 1

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Thanks for the effort,

Unfortunately I could not open your hip file with H15.5 but I tried to set this material up but no success so far. I'm not sure if the constant type is correct (or any other value)

printscreen.png

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Unfortunately it does not work properly in my setup. (And also couldn't render your scene because of an error message.) :( I guess I'll have to find another method.

Thanks again

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fencer unfortunately I can't open h16 file :(

dave: Yes I can get the shadow in alpha channel but not the light. Can I get that as well somehow?  *Maybe I figure it out :D

 

Edited by bilicsko

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why don't you do two renders and then comp them together? sure you can get both in one render but that will require some setting up that you'll have to figure out ;)

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Haha yes, I suppose I was complicating the initial question, my apologies.

Normally, as Dave mentioned, you would have to render it out in separate passes. One for the light, and for the shadows, and a beauty pass, possibly with matte objects.
Fencer's file is doing just that (except for the beauty pass still showing the ground geometry.. which can easily be turned into a matte object). If you can download H16, you'd best check out his file :)

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