Why would you even? That's why it's called "compositing" - it's an illusion, not a realworld simulation. One would simply use the native footage, transform it and slap on effects. That's ultimately what blending modes, masking and all that are for... Simply don't use any light and/ or turn off the "Receive Light" option on the respective layers and use conventional effects to achieve the right look.
Admittedly, I've never done a project such as this, so thank you for your help. The results are great.