A quick tutorial on how to create an animated luma matte or mask inside MODO. This technique will work in 601 too and probably in 801 once it get released;).
With this technique you will be able to create wide range of cool animated mattes that you can use inside After Effects or inside Modo as animated textures(examples are shown within video).
Sorry, sadly no sound as I've done the video earlier on - just bought a new microphone and due to other commitments can't really do a voice-over now - even tho I started..., to be fair it's a fairly easy concept so anyone should be able to follow along. If you have any question just post them in the comment section.
Brief description of the technique:
1) Create a plane roughly the size of your frame - it will be the object blocking the rays(camera view) - so anything above it will be visible and anything below will get cut off.
2) get rid of the default lights, turn off GI and increase the AA samples a little bit.
3) Create objects that will be base for your alpha - assign new material to them and make sure to add Render Output - alpha to that material
4) animate the "blocker" ;)
5) Use the previewer to render the sequence quickly - usually 5 minutes of baking is more than enough for 75 frames of animation.
6) Swap the "alpha shapes" with other objects, if you need to adjust the shape, make sure to use the replicators so you don't have to edit every single item, or creating an array again.
Thanks for watching!