-
Setting alpha map in cinema 4D
Hi,
I am trying to do a card opening intro for my video, in which the card opens and flip to a page which will transit into the video footage that will be edited in Final Cut.
I have a card bottom texture which I assign the texture with alpha turns on, so that portion will be transparent for my video to show through in final cut. However, after I rendered (quicktime animation codec, millions colors +) and import it into final cut. The alpha does not show, though the item properties recognise it as a straight alpha.
Have I missed out any important steps that I should be doing in order to get this right?
Please advise guys.
Thanks
Ken
-
4 Replies
-
Should work straight or not, unless you have something behind the card that’s blocking the alpha.
-
It does not work, I do have a ground background behind the card bottom which I assign the alpha, but I cannot turn it off as I need it to be rendered as well. I though I can assign a alpha texture to the card it should just rendered that as an alpha map, apparently it does not work thay way. Any way to do this?
Thanks
Ken
-
Alpha only works (in the compositing sense) if there is nothing behind it. You are wanting a “put a hole through everything here” kind of thing. Don’t know if it exists. But…
-Render the ground/card as a seperate passes or,
-instead of alpha use a matte color in the same spot, composite using chroma or,
-place alpha on the ground behind the alpha on the card or,
-bring the footage into C4D and composite there…probably more ways…
-
Hi Brian,
Thanks for the info, I tried to render it with a separate pass using multi-pass, put it in the image mask in final cut filer does not seems to work.
Seems like I have to use the chorma key option and use the card bottom as a matte object and key out in final cut
Reply to this Discussion! Login or Sign Up