Projection mapping with Photoshop and Resolume

Lucas Dittebrand posted a nice video on YouTube demonstrating how to create a perfect mask in Photoshop that can be loaded in Resolume so the video only shows though on the objects on the wall. Very nice trick!

here's a little guide:

The resolution of the second screen should be the resolution of the output in resolume (e.g. 640*480).

In photoshop you create a file with the same resolution (transparent or black background)
drag the window to the second screen.
press "F" two times to go into full screen mode and hide the rulers if visible (cmd+R).

Choose the pen tool "P" and select "shape layers" in the bar at the top (first button).
I usually choose red as the foreground/shape color.
Now draw one square with the pen tool. if you draw a second shape, a new layer will be created automatically.
with the shapes it is possible to fine tune the squares, if you didn't put the corners exactly. Just use the direct selection tool "A".

When finished (delete the background layer and ) save the file as transparent png.

Now load this image as a mask on the composition in Resolume.

Awsome!