There are different types of grain nodes in nuke, but the problem is, while they may accuratly emulate specific types of filmgrain, they make your image – to put it mildly – really ugly. This is why I decided to create a “beautiful” grain gizmo. The key thing in my opinion is, that noise shouldn’t modify chroma, but luminance. I exposed knobs to control intensity and grain size (just a blur essentially). […]
No matter what you are rendering, at the end of the day you probably need to setup a nuke comp, and shuffle your framebuffers/passes/AOVs – you name it, to recreate your beauty. This is why I wrote a little script that does this tedious job for you.
Every modern renderer has to deal with fireflies (very bright, nervously jumping around pixels). Sometimes it’s quite difficult to get rid of those and often enough very high sampling just isn’t an option within tight deadlines.