Alpha Channel Question

epochapex's picture

Hey,

After looking at the two examples, I just can't get my head wrapped around how to get the alpha channel displaying in QC.

I looked at this thread, but the examples were difficult to dissect: http://kineme.net/forum/Discussion/DevelopingCompositions/MaskExistingimage

I tried this plug-in, but the alpha blend mode is not what I expected: http://kineme.net/release/AlphaBlendMode/10

Say I have a 3D model loaded into a Render in Image Patch that is hooked up to a Particle System Patch. How could I get the background of the 2D rectangluar images to be transparent? I end up with the colour of the clear patch in the Render in Image patch with no alpha channel.

I can post an example if required.

Thanks for your expert advice.

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franz's picture
Re: Alpha Channel Question

set the Clear patch of your RII to alpha=0

epochapex's picture
Re: Alpha Channel Question

Hahaha! It's that easy?!

I was checking out your blog by the way. Cool Stuff. I wish Canada had a massive videomapping community like Europe.

Thanks Franz.

franz's picture
Re: Alpha Channel Question

thxx. So bad you're far from Montréal, we're playing there on May 7th.

photonal's picture
Re: Alpha Channel Question

epochapex wrote:
I wish Canada had a massive videomapping community like Europe.

Well I'm in Europe and there isn't much videomapping going on here either ;-) (in Orkney)

epochapex's picture
Re: Alpha Channel Question

@franz — Too bad I couldn't make it to Montreal. I was going to go, but I got sick and had to cancel. The French at least bring lots of great talent from Europe to Canada.

@photonal — Yes, I guess I idolize Europe, but I'm sure if you were on the continent, there would be lots of chances to get involved.

Thanks for solving my problem. Yes it works.

I was wondering why something so simple would be so hard; well its not, just didn't knwo where to find it.