Ok, if you’re going to customize the frame, be sure to read docs.md where it explains briefly how the png color channels are used by the shader to draw highlights, reflections translucency etc.
“Source” layered Gimp file is included in the master repo.
The docs are great btw! I think that I figured out the most important things 
Hi there,
Version 3.5 is up on github and should be available via online updater in Retroarch too shortly.
Relevant changes follow:
With this release, due to new code added and the need to add a whole new pass to the pipeline, I observed an increased gpu use of about 5…7% on 1080p on my Haswell IGP, sorry about that 
monitor-slotmask-bloom-bezelwider - Arcade - Final fight
monitor-Commodore_1084S-wider - Amiga - ProjectX SE
tv-PAL-my-old - Master System - Trans Bot
tv-NTSC-1 - Genesis - Sonic 2
tv-NTSC-2 - Snes - Aladdin
tv-aperturegrille-bloom-bezel - Amiga - Leander
Nice to see that rainbow banding effect in the Sonic 2 waterfall shot, I’m definitely a fan of your shader presets they give off a nice nostalgic vibe.
Oh, thank you so much.
Nostalgia pushed me since the beginning, and after all it is all about that.
Just to say one, I made the pal preset to play transbot as I did 30 years ago on Master System I received for Christmas
Nice man, I’ll be keeping an eye on this thread. I’m assuming that was an artistic choice with going with the “jail bar” look instead of blending the waterfall in more in that Sonic 2 shot?
More or less.
Yes, I don’t like the pixelated effect that happens when totally blending the waterfalls in all of the shaders i’ve seen and i’m from Italy, so i don’t really remember/know how NTSC/CVBS looks, it looked fine that way, so i stayed with it.
But to be honest, my shader is unable to selectively blend that way, this is because I’d like my shader to be as light as possible and totally usable on integrated gpus, so I take shortcuts and full ntsc modulate/demodulate passes are just not present.
Nhe NTSC function is actually a modification based on a very light/single pass shader by xot you can find on shadertoy.
By now, I provide options to do accurate color bleeding in PAL and NTSC bandwidth domain and others to modulate the rainbow “width” and to tilt it, but it does not pass the NTSC chroma/luma crosstalk test.
However, I’m personally satisfied of the overral look of CVBS emulation.
I’ve some ideas to further reduce the gpu use by taking other “shortcuts” and keep the actual functionalities, but I doubt I’ll ever improve the correctness of the NTSC emulation, due to lack of motivation and heaviness of such implementations.
Cool. I have the version available in the RetroArch online update. When downloading from GitHub more files come. Can you explain to me how I do the installation?
Pixelated look? Wouldn’t it become more smooth looking since those pixels are being blended? That’s the look I went for with my composite ntsc “2phase” shader presets my shader preset pack.
I understand about keeping the shader as light as possible, I was messing around a few days ago adding in both the scalefx and xbrz freescale shader on my presets for a smoother upscaled image, it came out looking excellent but then my system couldn’t handle it so I ended up scraping the whole idea, for now at least.
Either you wait a bit for them to come in Retroarch, or you can grab the 3.5 release from github and unpack it somewhere in your -already in place- slang shaders folder.
wops, missed that very same screenshot on sonic 2, looks really nice indeed, and what a nice research on 2/3 phase systems, very informative!
Thank you, I plan on releasing a new updated shader pack real soon (this week hopefully) that looks even smoother and vibrant, can’t wait to release it on you all soon lol. And yeah, I sum up the 2-phase and 3-phase ntsc system as one being vertical rainbow/artifact/more blended effects (2-phase) and one being diagonal rainbow/artifact effects/less blended (3-phase).
Wow! This changelog reads like my wishlist from a year ago!
This is amazing performance! Have to give this a try sometime. I guess no one has to be left out of the high quality CRT emulation experience even with Bezel Reflections included!
This is some motivation right here to finally replace my broken laptop screen’s hinge.
When I see output like this. I think retirement.
Great work!
Thank you, but I’m not saying the gpu usage is 7%, I meant it went up by that versus the previous release, lol! On that igpu it reaches abput 90fps so the gpu usage stays around 65% for 60fps/240p content at 1080p.
I understood this. However this is still the first time that I’m learning that this brilliant piece of work runs on an IGP, hence my pleasant surprise and elation, despite the performance regression.
Hi kokoko3k , congrats on your awesome update, it’s quite a leap forward in terms of quality and beauty. I loved being able to choose the style of slotmask I prefer, and while you’ve seen higher CPU usage, personally the performance for what you offer is still outstanding. Congratulations and thank you very much for your work. I think you’ve peaked by now, I can’t imagine what else you could work on with this shader. Top!
Truly excellent shader, especially considering the quality vs performance. A quick questions: I use a modified version of CRT-Universal for most of my imaging needs (vignette, colour, blurring) - is there a chance I can just insert this as a pass within your shader to use it with some of your features (background, bezel, mask)?
Hello, sorry for the off topic, but this CRT Universal is interesting, where can I find the latest version please? thank you
There should be a link to it in that first post itself…
Thank you
