Exporting 3D with transparent background

[PeteGeo]

All,
First, great tutorials and threads! I’m new to Invigorator and fairly new to AE but have already accomplished some great effects. This is a testament to create info on sites like this.

I created a letter that rotates on it’s Y axis and want to use it in a lower third ID built in Motion. I’ve read the threads here and searched the web for an answer on both Invigorator and AE and am still confused. How can I render the spinning E with a transparent background so that I can place over footage?

I have come very close using keying, trying both blue and green, but get some artifacts around the letter.

Thanks in advance for the advice!
Pete

[John Dickinson]

Hi Pete,
You need to render the layer out with an alpha channel. In the Render Queue you’ll see a section called OUTPUT MODULE. Under CHANNELS choose RGB + ALPHA and the DEPTH will change to MILLIONS OF COLORS+
From the COLOR popup I recommend you choose STRAIGHT not PREMULTIPLIED. Keep in mind that you first will need to choose an output format in FORMAT OPTIONS that supports alpha channels; for example the Quicktime ANIMATION codec or perhaps a TGA sequence (32 bit option). Let us know if you need more assistance.

JD

John Dickinson
Motionworks
http://www.motionworks.com.au

[PeteGeo]

Thanks JD! Worked like a charm.