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12.0 or later
Movie sources: Black Swan (2010), The Tree of Life (2011) and The Hurt Locker (2008)
This gizmo is a simple film halation filter/effect primarily for sRGB and Rec709 footage. Film halation is a characteristic of celluloid film/film stock when a bright light basically manages to bounce back a few times from a bright light exposing the film a second time only affecting the red layer of the film and then a bit of the green one resulting in a reddish/orange glow and is often desirable for when emulating the 'film look'
I learn new things every day and I've done so now for over 9 months to be able to create a decent working, efficient and simple method of emulating film halation. I update this ever so slightly every day so I might update this gizmo a few times on this site.
I've found other methods of doing this on the internet. None for nuke but some for resolve. I didn't feel comfortable working between resolve so I decided that I would have to try to figure out a way to do this in nuke which would please my workflow.
Steve Yedlin has been my main inspiration for this. Yedlin has spent more than 10 years of life on film emulation and has worked in movies such as Star Wars and Knives Out where he uses his methods, though he doesn't cover how to do it, he rather talks about it in a philosophical fashion.
Minor update v1.3
Fixed a major bug where the new contrast edge feature would not work.
Fixed some minor bugs and added adjustments for a smoother workflow.
Bad and good news: Unfortunately, I haven't yet managed to figure out a way of fixing the issue where if you're working in ACES, nuke can't find colorspaces outside the current OCIO config. For now, you'll have to either somehow merge the default nuke OCIO config together with the ACES one (doubting if this even works) or temporarily use 'Screen method' instead of 'Alpha method.' An interesting side effect of this issue is that ACES renders the halation in a rather interesting way. When I tweaked the screen method to work with ACES I discovered that when tweaking with the erode parameter the erode blur seemingly has a lot more pronounced ray looking halation than when working in nuke's default color space. I find this to be a lot more realistic.
So, for now, the people that are working in ACES will have to use the Screen method instead but with a bit more natural-looking halation in my own opinion.
Added more advanced controls and 1 new blur method which uses both blur and erode.
Added also two halation methods one being the default 'Alpha method' and the other new one being 'Screen method' which uses both blur methods only but has a softer look to it.
Added a new feature being 'Contrast edge' which adds the possibility to include a white edge to the halation. I have yet to find any good information about this artifact but I've noticed it personally in a lot of movies and thought it'd be neat to add it as a little feature. From what I've seen it seems to occur when the film is overexposed and somewhere in the pipeline the process of pulling down the blown-out parts somehow introduces these artifacts.
notice the white sort of contrast/sharpen around edges
First Update v1.1
Made changes to the UI and added a feature where you can switch between blur or erode. This affects the way the halation 'glows'