Masks 0, 5 and 9 are working differently with mask size 1.0 compared with mask size of 2.0. You can easily skip them with 4k and use other solutions.
The catch is that only mask size of 1.0 ensures a RGB subpixel distribution. With mask size of 2.0 you deal with magenta-green masks.
Probably the best thing to try here is set all the Mask Size and Slot Mask Size to 1.
In the Mega Bezel they are currently set at 0 by default which is auto (goes to size 2 at 4k). Which has caused problems for a few people now…
In the next release they will be set to 1 by default.
Okay thanks I will use one of the other masks. Just to summarize for anyone else:
working masks that produce RGB subpixels at 4K and mask size 2:
Lottes: 1, 3, 4, Shadow Mask: 10, 12
non-working masks that produce off-colored subpixels at 4K and mask size 2
CGWG 0, Lottes 2, Shadow Mask: 5, 6, 9, 11
Tested at 100% non-integer scale
The thing is that only 2 masks produce RGB sub pixels at 4K at mask size 1. 10 and 12. The rest either appear white or have magenta in them.
Greetings @vookvook,
What make & model display are you using?
Is your desktop resolution set to 4K, SDR and colour format RGB 4:4:4?
How do Mask 6 and Mask 12 look?
Are you using the latest HSM Mega Bezel Reflection Shader? What version are you using?
What used to be Mask 13 is now Mask 12. It’s an aperture grill (Trinitron) mask.
If you’re on a 4K screen you’re supposed to use Mask 13 (Old)/12 (New) at size 1 for correct results.
Hey Cyber, it is this one: https://www.lg.com/us/tvs/lg-75UK6570PUB-4k-uhd-tv
Yes it is 4K SDR.
I don’t know about 4:4:4 I’m trying to research it. Is that on my TV or is it in Nvidia CP?
Mega bezel v 1.0.001 2022-06-24 rev 1
Mask six looks almost exactly like mask 2, mostly RGB with a single line of magenta
You’ll find that in nVIDIA Control Panel and also Windows Display Settings.
I’m going to look up that TV.
Do you know that some LG IPS TVs use non-standard subpixel arrangements?
I didn’t know that but I think you can see in this pic that it is RGB, right? https://imgur.com/a/3fDoWDu
I couldn’t find that 4:4:4 setting here is what I found: https://imgur.com/a/bo4Pq6B
I don’t know about that pic but this look like BGR to me but you can do some research and get back to us with the colour format. That would help quite a bit.
Also, is your Input set to the PC Icon and are you using Game Mode?
Oh and have you switched your Input to use HDMI Deep Color?
I’m seeing here that it does support 4K @ 60Hz @ 4:4:4 so you just need to make sure the TV is setup correctly by switching your Input to PC, setting your HDMI Deep Color to On and using Game Mode and verify that the resolution that you have the TV set to is using RGB Full 4:4:4 Colour Format.
Yeah the subpixels are definitely RGB from left to right, opposite of that pic.
Input is set to PC. HDMI Deep Color is switched on.
I couldn’t find that 4:4:4 setting here is what I found: https://imgur.com/a/bo4Pq6B
Same settings in Nvidia CP
Go into nVIDIA Control Panel then Click on Resolution. You should see the Colour Format and bit depth there in addition to the resolution. Can you post a screenshot of that please?
From the looks of this, your TV seems to be setup correctly.
Since you’re not in agreement with the subpixel arrangement that RTINGS had posted for your model, perhaps you have a variant with a different panel.
Some LG IPS panels use “special” subpixel arrangements and that might be a possible source of your issues.
I’ll share what I’m talking about below:
If your TVs subpixel structure is like this then you’re going have to do some soul searching and deep meditation and start coming up with combinations of mask patterns and layouts that actually look okay on your TV. In other words, you’ll have to be a pioneer of some sorts.
Now this doesn’t have to be your issue but I’m just putting it out there that these things exist and have the potential to cause issues like the ones you seem to be having.
I tried switching it to BGR and it just made the colors all messed up like cyan and stuff. It also still showed the same issues with color blending, just in different colors.
By the way, if you’re using deconvergence, you might want to temporarily disable it while trying to verify what’s going on with your subpixels/mask interaction. Deconvergence settings can also lead to issues like this.
Thanks for looking this up but yeah I am sure that my RGB layout is pretty standard. I’ve taken a close up pic of the pixels and it is clearly standard-spaced RGB. Just zoom in on this pic and look: https://i.imgur.com/MTx8FII.jpeg
This problem seems to be something else because even with the mask size set to 4, mask #11 looks like this: https://imgur.com/a/FKD9dp8. The yellow pixels are way bigger than any of my LCD pixels.
Also on several of these masks, when a blue row bumps against a red row it makes magenta, even with a big mask size. You can see it in that pic that there is a single column of magenta between the red and blue. That is the issue I think that is causing my problem. It’s okay when the mask is huge like that pic, but when the pixels are just two pixels wide and one of them turns purple then that is the issue.
I’ve checked that deconvergence is off.
Take some pics with Mask 6 size 1.
It’s green/magenta: https://imgur.com/a/wPrlFny
On my surface pro, which is a completely different display, on mask size 1 it produces green/magenta and with mask size 2, it produces a purple line where the blue abuts the red: https://imgur.com/a/RynAQEx
A few thoughts.
First off. I don’t think this is a shader issue so doesn’t really belong here.
Second. I would suggest loading some of the community presets that are based on Guest ADV. Instead of trying to reinvent the wheel why don’t you see if someone else has a solution already.
If you find something you like you can mirror their settings. It just needs to be done once and you are a happy camper. 
Nope, in this case it’s definitely not. Some of us here literally live with this shader so we’ll probably find issues like these in our daily use and testing if it did in fact have anything to do with the shader.
Try my preset pack which has been tested, verified and vetted by yours truly to work as I expect and see if you have similar results. If you still do then it’s definitely something going on your end. Maybe you might need to setup RetroArch and Mega Bezel again. Remember updating Mega Bezel requires you to delete the old folders.
Try these and see, you can also try with a fresh install and you can report your findings in the CyberLab Mega Bezel Death To Pixels Shader Preset Pack thread.
