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Compositing blender exports into Elab [ANSWER]

Posted: Wed, 2nd Aug 2006, 11:58pm

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Gman 007

Force: 168 | Joined: 13th May 2006 | Posts: 104

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i created something in blender for our movie but it don't seem to blend in well with the footage. when i rendered my animation it had a blue back ground so i put a mask around my animation so all i recieved was the animation with the footage and not the blue back ground but it still dosn't seem to look right.

can anyone help me.
Posted: Thu, 3rd Aug 2006, 12:05am

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Force: 13107 | Joined: 16th Sep 2004 | Posts: 848

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Instead of rendering your animation against a blue background, can you export it with an alpha channel? That way, when you import it in ELab you won't need to mask it, since ELab will detect the alpha channel and handle the transparency appropriately.

It's worth checking that the lighting on your animation matches the real-world lighting in your video footage. That is, the shadows and highlights should be consistent.

After that, it'd be a good idea to try and grade your animation so that it matches the colour/style of your footage.
Posted: Thu, 3rd Aug 2006, 8:20am

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Simon K Jones

Force: 27955 | Joined: 1st Jan 2002 | Posts: 11683

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As Hendo says, exporting from Blender with alpha is vital. It's been a fair few years since I used Blender, but it can export to alpha TGA image streams easily enough. It can probably do a lot more than that now, in fact!

Whenever you're working with images or movies from a 3D or 2D graphics package, you should always export with alpha so that you can incorporate the files into other programs (such as EffectsLab) with ease.
Posted: Sat, 9th Sep 2006, 9:35am

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Force: 1000 | Joined: 25th Apr 2006 | Posts: 29

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sorry im a noobie, im using the icarus/blender/visionlab combo.

and im fairly new to the scene, is there a tutorial step by step on how to do this?

i get that blue backround too and well yea i dont know how to export using alpha channel.

can you help me?

Posted: Sat, 9th Sep 2006, 10:11am

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Force: 2899 | Joined: 27th Dec 2005 | Posts: 1043

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I have used Daz 3D Studio to export image streams of TIFF files which I then imported into Comp Lab but I guess it would be the same in Effects Lab. My render was of a dragon (walking, flying etc) with just a simple black background.

You don't have to worry about creating an alpha channel - it just exists as part of the file format (I guess TGA is the same as TIFF). Render your Blender output animation as a series of image files and import them into the FX Home program. When you drag the image stream over the video footage the background disappears automatically as the alpha channel is detected.

Just try it - don't worry about how it works, it just does!