@Furry_02 (View Post)
The best documentation we have for this is actually the Lua docs: https://powdertoy.co.uk/Wiki/W/Lua.html#tpt.graphics_func

But back to C++, you create a Graphics function (check how other elements such as ACID do this), then return a large list of arguments (documented in that wiki link) and flags. This will control the rendering. Set cache to 0 if your element may vary from the default based on particle properties.