Congratulations guys, this is a huge step forward!
For a while I've been trying to make a "window shader" using emission and a texture in distribution slot + projector linked to the camera with some expressions but it was a mess. And then I found THIS, and since then I was hoping this would one day, maybe, just maybe, work in Octane.
But I did not expect that a simple copy/paste would work straight 'out of the box' in the first beta

Two polygons and one texture:

...Five minutes, 128 triangles and 5 textures later:

Here's a basic setup. Obviously, I am NOT an advanced user, so I get a crash if I try to embed a texture ( input_tex ) in the Orbx. Textures can be downloaded from the author's blog here and they should go in the "input_tex:" slot.
Have fun!
Regards
Milan