I'm looking for a Gaussian blur to do things like this:
If i understood well, are you saying is not possible change the blur param on C2 to adjust and only can be added in the .FX?, i mean, then how the Blur, GLow and things like that do it in the scirra shaders? Maybe for shadow do something out the Main to do the blur and then copy in the main the result i don't know XD.
So, if for some reason you can't achieve a blur like that to be edit by param then leave it, as i said the actual shadow fx works for the game i'm working.
PS: Thanks to you! you deserve it! my game is looking better every time you release a shader