How do I add a thermal effect to the entire layout?

Basically I want to have an effect similar to the heat vision from Predator. I have tried many effects from the layout itself and on objects that could potentially be enlarged to encompass the layout, but nothing works. (if it helps, the background color I am using is black)

I wanted to achieve something similar to this also. The closest I got to this was making all objects do the additive blend mode.

And then over the whole screen, I added a dark blue film with about 50-100 alpha (for transparency).

Ok I tried that and it just might work to some degree, though it will involve a lot of experimenting and I felt like I was getting close with setting the vibrance of the filter (blue sprite) to 200%, having some sort of transparent red or yellow sprites with the additive blending behind the blue and in front of the other objects, and having the layout effect have 200% vibrance as well.

These shaders should be pretty easy to port to c3 by someone with a bit of experience with effects dev.

https://www.shadertoy.com/view/MdGSWD

https://www.shadertoy.com/view/MdfczN