object with color "invisible"

Blender's renderer and external renderer export

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tmohr
Posts: 14
Joined: Sun Dec 28, 2008 11:56 am

object with color "invisible"

Postby tmohr » Mon Sep 24, 2012 11:45 pm

Hi,

i want to place an object A of color / material "invisible" in front of other objects and in the final render i'd like to see alpha=0 at the pixels that show object A.

So object A is in front of other objects that have normal color. A is marked as invisible but you can't see through but if you render a PNG you see a hole in the PNG where A was visible.

I hope it is clear what i want to achieve.

I saw some hints to check the "Sky" checkbox but that did not help.


Thanks for any hints,
Torsten.

CoDEmanX
Posts: 894
Joined: Sun Apr 05, 2009 7:42 pm
Location: Germany

Postby CoDEmanX » Tue Sep 25, 2012 1:19 pm

Use Transparency, Mask Alpha 0.0 for the invisible material:

http://www.pasteall.org/pic/show.php?id=38131
I'm sitting, waiting, wishing, building Blender in superstition...

tmohr
Posts: 14
Joined: Sun Dec 28, 2008 11:56 am

Thanks

Postby tmohr » Tue Sep 25, 2012 10:54 pm

CoDEmanX wrote:Use Transparency, Mask Alpha 0.0 for the invisible material:

http://www.pasteall.org/pic/show.php?id=38131


Great, exactly what i wanted.


Best regards,
Torsten.


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