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Render to texture
show user profile  Footers
Hi,
I am trying to render a specular pass to texture and all I get as a saved file is a black backgrounded image with the entire object red. I can get around this problem to a certain extent by applying a black material with black ambient and only specular which creates a nice complete map render of a specular pass which is fine but I don't get the pixel padding by doing this. Can anyone please advise.
I am using a standard blinn material with a sun system for lighting. I've rendering using both Mental ray and Scanline both not working properly. I'm trying to bake a specular pass into an existing texture along with an ambient occlusion pass which works fine. Why doesn't the specular pass work?
Thanks in advance.
read 672 times
3/10/2009 3:09:26 PM (last edit: 3/10/2009 3:12:15 PM)
show user profile  K-tonne
is the model mapped?

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read 668 times
3/10/2009 3:11:36 PM (last edit: 3/10/2009 3:11:36 PM)
show user profile  Footers
The model is mapped just fine as I said the ambient occlusion pass works just fine. It's just the specular pass appears red when using MR and white when using Scanline. I've tried saving as different file formats to no avail.
read 665 times
3/10/2009 3:13:46 PM (last edit: 3/10/2009 3:13:46 PM)
show user profile  Footers
No one can help me then? Can anyone suggest another forum I can post this on?
read 612 times
3/14/2009 8:34:56 AM (last edit: 3/14/2009 8:34:56 AM)
show user profile  K-tonne
what sort of lights are you using in the scene?

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read 603 times
3/14/2009 8:55:10 AM (last edit: 3/14/2009 8:55:10 AM)
show user profile  Reality Man
Are you using HDRI's in the background or anything?

Are you using Pro Materials or A&D? nevermind>just re-read your post
Check your exposure settings?

Just trying to guess at this.


edit:

If you're using the sun system and it added a physical sky map that might screw it up? (combined with the logarithmic exposure maybe)
read 596 times
3/14/2009 9:01:25 AM (last edit: 3/14/2009 9:09:16 AM)
show user profile  Sir_Manfred
Sounds like you are getting raymisses.
Try increasing the size of the projection cage (if you are using cage)
Check that all source-objects are included in the projection.



Visit my Portfolio
http://www.Freds3D.com

read 581 times
3/14/2009 10:57:53 AM (last edit: 3/14/2009 10:57:53 AM)
show user profile  Footers
Thanks for the replies. I am using a daylight system but did try an omni, with no change in result. I can use any light, it doesn't really matter.
No HDRI's, nothing complex at all to be honest.

I'm sure my model and UV setup is all fine because a Occlusion pass works just fine. I just can't get a specular pass to render anything other than red covering the objects UV coords.

Someone has mentioned the lighting tickbox within the selected element unique settings but it makes no difference. I'm running 2008 version.

Any other ideas?
read 542 times
3/15/2009 10:57:05 AM (last edit: 3/15/2009 11:13:37 AM)
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