@woland

Brilliant! 

Many thanks!

jbb

@mark

Thanks Mark. I've attached some text files with the amended code here.

Looking forward to seeing what other people are doing with shaders.

All the best,

Andrew

TT Shaders with Alpha.zip

@AlexWilliams - or to build on @jhoepffner's scene - make your background a blur of the source as well - is that what you meant? the 'blur gradient' is affected by the amount of blur on the shape, and the background blur is the maximum outside.