Bezier Help Wanted - Sky Replacement

[willbrownltd]

Hi,
I have only been using Nuke for a few weeks, so any help would be greatly appreciated.
I am trying to remove the normal blue and white sky, and replace it with a red sky on 190 frames.
I am using the Bezier tool but I cannot find the right merge settings (mask, overlay, add).
Please can someone advise which setting I have to use?

Please look here for a screen shot and a clearer picture:
http://i150.photobucket.com/albums/s...ords/nuke3.jpg


Thank you in advance,
Will.
www.willbrownltd.co.uk

[dot]

find attach
make sure bezier only alpha is on add premult to that

[willbrownltd]

Thanks Dot, really appreciated.
Will.

[fertilizer]

Apart from clarity, is there a reason to use an extra premult node?

Couldn't you premult the RGB in the bezier node? Or if there's a reason for the bezier to output unpremult, use the 'matte' operation in the merge node (5.2v2 manual, page 149)?

[im.thatoneguy]

Alternately you could "OVER" the house over the background and pipe in the bezier as a mask.