how to export alpha channel behind prop

[kevin0]

how do you export a movie from am with just the object you built over an alpha background?

 

thanks

 

kev

[rusty]

how do you export a movie from am with just the object you built over an alpha background?

 

thanks

 

kev

 

Kev,

 

In the Render to File Settings you must:

1. Select advanced options

2. render it to a format that supports the alpha channel: a tga sequence or a quicktime movie

3. Under Buffers turn 'Alpha' to 'on'

 

Cheers,

Rusty

[kevin0]

how do you export a movie from am with just the object you built over an alpha background?

 

thanks

 

kev

 

 

that's what i've been doing but it still comes out with no alpha channel that fcp sees; just the ground and a black sky background....

[robcat2075]

What are you rendering to?

 

The only Quicktime codec that can hold an alpha channel is "Animation". The codec is set in the "compression " settings. (Avoid "Animation" for all other purposes, however. It makes huge files.)

 

Targas can also hold an alpha channel.

 

I don't use FCP, but I know After Effects can ignore an alpha channel if the import settings are not right/

[kevin0]

you are a genius; thank you! it needed to be on the animation codec