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Old 15-06-2004, 01:02 PM   #1
nirsul
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Default Sun Rays into a room

Hi

How can I force a light fog to appear only through a window and not as if it passes through a wall.


In ****** , Alex creates the effect but never explains.

Nir
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Old 15-06-2004, 01:06 PM   #2
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might could use an area light, which is square in shape.
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Old 15-06-2004, 01:41 PM   #3
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mayabe you need to add a gobo to your light, that will give it a square shape. But thinking about it the fog shouldnt really go through the wall. Is it the fog or the light that is passing through?
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Old 15-06-2004, 03:32 PM   #4
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I have had many trials and always the light and fog were entering as if there was no wall.

I will render the current scene and post it her.

Nir
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Old 15-06-2004, 04:33 PM   #5
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Here is my image - I tried using barn doors and a gobo and all sorts of tweaks but alas - nothing works

I read that in MR there is TRANSMAT and participating media - but there are no explications regarding how exactly I use them.

Forgot to mention I was using Depth Map Shadows

And the ****** effect was done prior to Mental Ray

Nir
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Old 15-06-2004, 04:59 PM   #6
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setting up fog with MR is a pain. I have done it. They way I did it is created a box around my scene. I will post a file with all the connections
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Old 15-06-2004, 06:27 PM   #7
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my first question would be is the wall double sided? second question: you didnt unlink the light from the wall did you?
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Old 15-06-2004, 07:00 PM   #8
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Here is a file of what I was talking about. check out all the connections that are being made. There is a box that contains the fog area. Mess around with the parti volume settings. I think this should help you. It was originally done in Maya 5. I just had it laying around
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Old 15-06-2004, 08:32 PM   #9
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Quote:
Originally posted by Pure_Morning you didnt unlink the light from the wall did you? [/b]

No light unlinkage was done here.

and Roach - Thanks - I will try it !
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