Lua sandboxing, but I'm not sure how well this works with the engine though.
http://stackoverflow.com/questions/1224708/how-can-i-create-a-secure-lua-sandbox
http://lua-users.org/wiki/SandBoxes
Would it be possible to emulate the effect somehow?
I wanted to give guns a heat haze effect or use it for a flame thrower, but with other shaders conflicting, I'm wondering if a work around is possible.
Do you know if anyone has successfully done this?
From what I've read too its to do with the rendering pass, but I had the impression the problem existed before the framework.