For no particular reason (other than creating the next Hollywood blockbuster
single-handed), I was wondering how to go about doing a bluescreen thingy,
such that I can superimpose something onto a water scene.

I have a blue screen (roller blind, which seems to work), and a toy (ahem,
*model*) Stingray. I also have some footage of a local loch. I'd like to, if
possible, make it look as if Stingray is cruising along on the loch. I'm not
looking for big splashes or the amazing dolphin-like leaps that the real
Stingray does - just an incongruous cruise past a local landmark.

I'm thinking of suspending the model from some extremely fine monofilament
line (actually 'invisible' sewing thread) and moving it along in front of
the camera. The main problem would seem to be the waterline - how to make
the lower part of the hull disappear convincingly. Would dipping the model
into a tray of water work? I'm thinking that the most of the water, apart
from some ripples, would reflect the blue screen and thus be removed when
the composite is done.

What about taking the newbie troll-bait approach and trying to do it in
software? IOW, film the bluescreen part without the tray of water, and then
remove the lower part of the hull in each frame. Tedious but doable, I
guess, but I don't see how to give the impression of ripples or a wake.


--
Wally
www.artbywally.com/FiatPandaRally/index.htm
www.wally.myby.co.uk