Here's what I have:
Layered geomtrical shapes (sphere, some cones and circles), which together resemble a dummy head. This is all working nicely, with the sphere at the top of the hierarchy. This means rotating the sphere rotates everything else. All well and good.

Separately, I've also successfully got my internal webcam linked to the GEM window, using the very simple:
|gemhead|
|
|pix_video|
|
|pix_texture|
|
|rectangle|

Here's what I'd like:
Layer the two together (geometry and internal webcam), with the option of mixing them such that you can see both of them.
I believe the geometry stuff needs manipulating before being inserted into pix_mix, but I have no idea despite a fair few hours and google searching.

Does anyone have ideas on how to mix pix_video with geometry, using the pix_mix object?

Many thanks for your time,
Oggy