Something I saw

[purecharisma]

I saw in an issue of 3d Magazine how to take a image of a skyscape and piant the upper floors to make it look like a missle had hit it. This was a locked down shot. I am wondering how I would achieve this same effect but with the camera moving around the building. I thought about painting each frame, but how would I keep it consistant so it doesn’t look animated?

[Victor Makali]

The way I would do it is Track the shot with Bujou3 and either use a 3D rendering for the blown up part of the building or if you don’t have 3D but you have a 3D compositing App like FFI paint one pic for each side of the building bring in your tracking info and match it up in 3D space. That should work.

[David McDonnell]

thanks that is kind of what I thought about doing.

[Michael Dalton]

Sounds like a job for 3d tracking and projectors onto very simple cards. Pick the frame in the sequence where the matte painting will be the largest and do the deed. Position a card/image so that it lies on the same plane as the face of the building that you want to add the painting and parent the projector to the card/image and at the frame you painted the destruction. When you scrub the timeline, if you’ve lined everything up right and your camera tracking is good, the matte painting should lock to the side of the building nicely.

It would probaby pay off nice to top it off with some small pyro elements of fire and smoke, again parented to the cards/images. Flame’s a good bet but it would be a pretty sweet Nuke comp as well.

Interestingly enough there’s an article on the front page of FX guide from ILM – the Alien Smackdown – where they discuss some of these techniques with regards to Flame.

Good luck,

Chris

[Author]

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