i just dumped on the main repo a few updates from the last couple of weeks:
- better neutralized profiles. now kodak ultra endura is actually a nice paper that i feel wanna use. it was almost unusable before
- smoother diffusion filters and presets moking glimmerglass/black-pro-mist/pro-mist/cinebloom, for camera and enlarger
- band pass spectral filters optimized per stock for the spectral upsampler by hanatos, overall we have slightly better color reproduction of red and blues (they are less over exposed and over saturated), exposure error reduced from 20-15% to about 5-10% (rough estimates from round trip testing of exposures of real measured spectra)
- the inhibition coupler matrix for the negatives was tentatively refined algorithmically, still WIP
- better scattering halation model with possibility of stretching the highlights to recover possibly clipped irradiance of bright spots
- kodak verita 200d cine profile
not the cleanest development in the last weeks, but i was very driven and needed some fun. i will have to cleanup. i am not a real programmer, that was clear i guess 
since there were several upgrades in the last month i decided to do some quick edits of nice photos and play-raws that i had laying around in random folders of my hard drive. for many of them i remember struggling to get good results with agx-emulsion in the past. every edit is mostly default except a handful of parameters reported below each pic. all the raws were loaded directly in spektrafilm and edited in 10-20 seconds and saved as preview (computation is still a pain point, and would have been longer than the edit!). no lovely grain texture 
.
i made extensive use of diffusion filters and I used only the kodak still family. they all share a very similar color soul, and the share the same dir couplers matrix. thus the saturation is somehow democratically distributed (I doubt this is the case for real life chemical recipes). after some use, you familiarize with the punchiness scale of the stocks. the constant dir coupler matrix is probably enhancing this gradient of saturation/contrast.
essentially in a scale of saturation and contrast they are roughly like this:
kodak portra 160
kodak portra 400
kodak portra 800
kodak gold - kodak ultramax
koadk ektar
and
kodak portra endura
kodak supra endura
kodak ektacolor edge (slightly older look)
kodak endura premier
kodak ultra endura (vintage look) is a bit of an outsider and it has a distinct character
a good ux would make this scale very explicit.
mix and matching film and paper according to need is a quick and dirty way to have an impressively immediate library of juicy looks. nothing new under the sun, I know, but familiarizing with them while editing makes you feel very confortable. for example portra film + portra paper is the most neutral and gentle. ektar + endura premier is super punchy on the opposite of the scale. when in need of even more or less saturation we still can cheat with virtual chemistry boosting or reducing of the couplers.
ektar + ultra endura is somehow surprised me, it’s a very good combination for photos that need a bit of character and are dull. gold + supra is the spektrafilm default and sits on the mid-upper of the punchiness stack.
here the edits:
001 - signature edits JaroslavKriz33_IMG_3475.CR2
wb as-shot, kodak ektar+ultra, 0Y0M 1.1PE, cinebloom 0.5
002 - signature edits Signature Edits Free RawsIMG_5824.CR2
wb as-shot, -6Y-4M 0.9PE, kodak gold+supra
003 - signature edits Signature Edits free raw files tag @signatureeditsco IMG_4563.cr2
wb daylight, kodak gold+ultra, 0.86PE -4Y-2M, pro-mist 0.5
004 - signature edits Free Raw Files - Tag @signatureeditsco - _MG_2862.CR2
wb as-shot, kodak gold+supra, 1.1PE -10Y0M, enlarger pro-mist 0.5
005 - play raw 5D3_0104.CR2 Difficult orange flower
wb as-shot, kodak portra160+supra, 1.4PE 5Y15M, couplers 0.75, glimmerglass 2
006 - play raw 20250225_0032.CR3 Dealing with yellow color shift
wb as-shot, kodak portra800+supra, 0.6PE 5Y0M, couplers 0.85
007 - play raw 20240422_0008.CR2 Fishing for a sunset
wb as-shot, kodak portra400+supra, 0.58PE 10Y0M, couplers 0.85, cinebloom 0.5
008 - play raw 7E4A0518.CR3 [PlayRaw] Flower
wb as-shot, kodak ultramax+supra, 1.5PE -2Y15M, enlarger black-pro-mist 0.5
009 - play raw IMGP2775.DNG Pride orange smile, sharpness and color challenge
wb as-shot, kodak gold+supra, 0.5PE -5Y-2M, black-pro-mist 0.5
010 - play raw _DSC5869.ARW Golden Gate sunset
wb as-shot, kodak portra400+supra, 0.9PE 2Y-6M, couplers 0.74, glimmerglass 1