antialiased z-channel

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Old 05 May 2003   #1
antialiased z-channel

I rendered two seperate files, one "normal" and one for the z-channel

then I used the channel boolean, but I still have no antialiased edges :(

so is it possible to get a good DOF in digital fusion??
Old 05 May 2003   #2
You need what's called a z-coverage channel, It's essentially the anti-alias pass for the z channel. Depending on what 3d app you're using, may or may not be able to output this.

The other issue you may be encountering is the depth blur may be bluring against black. I don't have time to test this right now, but you might have better results with compositing the image on the sky first, then apply the DOF after.
Jason Kolodziejczak
Digital Fusion Consultant
Toronto, Canada

Last edited by Jayk2k : 05 May 2003 at 06:01 PM.
Old 06 June 2003   #3
Try to render your z depht (in fact RGBAZ) channel in double scale and them scaledown by half in compositing this sometimes solves some problems with staircasing in the Z channel.

I hope that helps!
diogo girondi | ••• | IMDB
Old 06 June 2003   #4
Just to clarify for diogo girondi;

render EVERYTHING at 2x rez, and then scale down the final image. By just redering 2x rez of your Z channel and then doing the comp, you will soften/anti-alias your z channel and that will produce incorrect results.

Obviously this will increase your render times and storage needs, but this can yeild better results if your 3d app of choice is not producing a z-coverage channel.
Jason Kolodziejczak
Digital Fusion Consultant
Toronto, Canada

Last edited by Jayk2k : 06 June 2003 at 08:17 PM.
Old 01 January 2006   #5
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