Blur and chocke edge at node editor

[toto79]

This might be something that is a engine thing but it will be great to have a blur function and a find edges
Functions to the node editor.

[aoktar]

I'll wait for 3.10 OSL build for this kind of requests and more. We don't have any possibility to write new procedurals in plugins without this language. But thanks for advice! When we have options to write custom runtime shaders then we'll see what can we do.