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voltagenh
3d Motion
on Aug 3, 2006 at 9:37:12 pm

Hey guys new to PI I have a 3d movie created in swift, im trying to figure out how to add PI to it and under and around my 3d movie.

not sure what info to post.


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Elvis Deane
Re: 3d Motion
on Aug 5, 2006 at 7:09:54 am

What format is the movie in? It'll need to be either an image sequence or a AVI on Windows or Quicktime on Mac for you to bring it into pI to add effects too. To add particles under an object, you'll need to render it with an alpha channel, unless Swift allows you to import a clip you create in pI and place that below your objects.

--
Elvis Deane!

The Apprentice Magician's Guide to particleIllusion


The particleIllusion FAQ


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VOLTAGEnh
Re: 3d Motion
on Aug 5, 2006 at 8:46:36 am

ok I am not certain about "alpha" channels.

I can output as png jpg avi swf.


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Aharon Rabinowitz
Re: 3d Motion
on Aug 6, 2006 at 5:01:57 am

color images in video programs are usually 24-Bit or 32-bit. each color channel (RGB) has 8-bits, so that makes 24. When you have transparency information (like where you have a logo, with the rest of the image transparent) then you have a 4th channel, called the alpha channel which is the other 8-bits, making it 32-bit.

In some programs you must tell it to use an alpha channel when rendering out your video or image. TIFF, TGA, and PNG's can carry an Alpha channel, but JPEG cannot.

So try outputting as PNG and see if it gives you any transparency options...

If not, import the footage into pIllusion, and see if it has transparency info anyway. It may do it by default.

----------------------------------------
Aharon Rabinowitz
aharon(AT)yahoo(DOT)com
http://www.allbetsareoff.com
----------------------------------------
Creative Cow Master Series DVD
particleIllusion Fusion Volume 1
available @ http://www.pIllusionFusion.com


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VOLTAGEnh
Re: 3d Motion
on Aug 6, 2006 at 5:26:12 am

wow thank you for that deep description. Usually you get oh it just this. I did render to PNG and it worked thank you very much.

So alpha channel is basically everything you cannot see. is that correct?


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Elvis Deane
Re: 3d Motion
on Aug 6, 2006 at 6:26:54 am

An alpha channel is a greyscale image that tells you what parts of an image will be transparent. So anything white is solid, anything black is transparent, and anything grey is partially transparent.

--
Elvis Deane!

The Apprentice Magician's Guide to particleIllusion


The particleIllusion FAQ


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Aharon Rabinowitz
Re: 3d Motion
on Aug 6, 2006 at 6:32:29 am

right. The alpha channel contains the transparency info - so information about what is, what is not, and what is partially transparent is all in there, as a grayscale image.

Open your PNG in photoshop, and then look at the channel pannel and you might see what we're talking about.

----------------------------------------
Aharon Rabinowitz
aharon(AT)yahoo(DOT)com
http://www.allbetsareoff.com
----------------------------------------
Creative Cow Master Series DVD
particleIllusion Fusion Volume 1
available @ http://www.pIllusionFusion.com


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