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# 1 15-06-2004 , 01:02 PM
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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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# 2 15-06-2004 , 01:06 PM
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might could use an area light, which is square in shape.

# 3 15-06-2004 , 01:41 PM
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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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# 4 15-06-2004 , 03:32 PM
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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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# 5 15-06-2004 , 04:33 PM
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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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# 6 15-06-2004 , 04:59 PM
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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

# 7 15-06-2004 , 06:27 PM
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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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# 8 15-06-2004 , 07:00 PM
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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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# 9 15-06-2004 , 08:32 PM
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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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