Adding simulated bricks

We've brought in two cg renders of bricks to start the destruction of the walls.…Can make it even more detailed by bringing in additional renders of debris.…Let's start with the left side here.…Before I bring in the footage though, I want…to show you the masks that I wound up with.…For example, here's castle left, if I zoom in you can see there's quite a…bit of detail on the subtractive mask, and the mask that cut out the wall.…So make sure you find a time to…make your masks more detailed so it looks more believable.…Let's bring in the footage.…Go back to the three folder, File>Import file.…

And the first one is called leftwall. And the next one.…It's called left chunks.…When I read these at 30 frames per second, that's fine.…But I do want to make sure they're pre-multiplied.…So right mouse button click, interpretive footage, main.…Pre-multiplied alpha.…Now if you leave it set to straight, unmatted, it's not the end of the world.…It'll still work.…Just pre-multiply it, it'll have slightly better edges.…I'll press enter. I'll do the same with left chunks,…