object with color "invisible"

[tmohr]

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]

Use Transparency, Mask Alpha 0.0 for the invisible material:

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

[tmohr]

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.