Sorry @Wilch I appear to have got mixed up with comments with yours and @faxesystem 
faxesystem did you get your washed out issues ironed out? See last few comments of mine replying to Wilch.
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Seeing that everything is working fine for you, can you post a couple close-up photos of some gameplay off your screen using 300TVL Mask with Reversed Layout please?
Thanks a lot @Wilch. That doesn’t seem to look right to me. I’m talking about the overall colours not the subpixel layout here.
Does it look normal in person?
I’m assuming the top image is RGB, while the bottom is BGR layout?
Both seem to be somewhat misaligned though. I’m seeing an either extra column of red in the top picture, or a 1 column gap between red and green. In the second picture I’m seeing some overlap between the second column of green and the first column of red.
@GPDP1 said that that’s supposed to be RRGGBBX. I wanted to compare it to CRT-Guest-Advanced’s RRGGBBX which seems okay at least on my 2016 OLED TV when the layout is flipped.
CRT-Guest-Advanced actually displays RRBBGGX when flipped however, so I don’t know if that could be the reason why it works correctly.
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When I say hdr works fine, I mean it kicks in correctly when I load retroarch. I don’t use the preset I photographed because it never looked right to me, I just wanted to show the mask clearly, but I removed the deconvergence.
I think you’re correct about the subpixel behaviour.
The jvc-pro preset is the only one that looks like my crt colour-wise from a normal distance. Also the other presets wash out all the detail in clouds etc.
I can change the mask on the jvc-pro preset to emulate a lower TVL screen while keeping accurate colours and cloud detail. I figured it was due to the scanline width creating the correct contrast or something, I don’t know.
In the game odyssey on the Amiga, the character has a white sword against a yellow background and the sword stands out very clearly on my crt. It only stands out well using the jvc-pro preset. It loses definition with other presets, similar to the cloud detail. I haven’t seen the game on any other crt though, only my pvm. I still haven’t fully got my head around the shader tbh
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Well, after looking at @Wilch’s photos, I finally got around to revisiting Sony Megatron Color Video Monitor hoping to see the RGB subpixel spacing looking as even as it looks in CRT-Guest-Advanced’s Mask 12, Size 1 with reversed Layout which results in an RRBBGGX subpixel layout.
Sony Megatron appears to use a BBGGRRX layout (or is it XBBGGRR layout) when Mask Layout is flipped, please correct me if I’m wrong both @guest.r and @MajorPainTheCactus.
I didn’t take any pictures this time but I should have from before. In my results flipping the layout didn’t result in an improvement in the subpixel alignment on my OLED TV as it did when using CRT-Guest-Advanced.
It actually looked worse than the RGB layout with yellow being introduced.
So it has me wondering how Sony Megatron Color Video Monitor would look using a similar RRBBGGX flipped layout instead of the XBBGGRR or BBGGRRX that it might currently be using.
Here is the output of CRT-Guest-Advanced for comparison and reference purposes.
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This looks really wrong to me:
There shouldnt be three pixels of red in this RGB shot and in the BGR the blue and green shouldn’t have an extra row of pixels in-between. I’d also not expect to see such a large black gap. Something is way off here - can you try simple RGBX ie aperture grille at 4K. Also it looks like these images are washed out meaning probably HDR is off/mismatched.
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Yes agreed something is up here - I don’t think it’s the shader (but could always be wrong). @Wilch Are you using full colour i.e 4:4:4 chroma? Sharpness is set to null setting?
Ok so that’s not an aperture grille layout that’s a slot mask but if it was an aperture grille as in no horizontal black rows that’s pretty much how I see my RRGGBBX. Something is going on here. 
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I’ll get some photos of what I see and post back - I’m in London at the moment so it’ll have to wait until I get back to my other monitor.
Yes this is definitely broken - if we could I’d love to figure out why! I’ll get some photos of what I see so we can compare and contrast.
Here’s the same preset just with Slot Mask turned off so it’s aperture grill.
I’m seeing a slightly larger gap between Red and Blue here so that suggests that either it is actually XBBGGRR, BBGGRRX or the same RRBBGGX that can be seen more clearly in the slot mask pattern.
CRT-Guest-Advanced - Aperture Grill - BGR Layout
CRT-Guest-Advanced - Aperture Grill - BGR Layout
Don’t want to cause any confusion. Below is the same preset as above just with the Mask Layout flipped back to RGB. So as you can see the layout is messed up. There’s a large gap between red and green plus another gap between blue and red.
CRT-Guest-Advanced - Aperture Grill - RGB Layout
Lastly, below is the same preset as above with RGB layout, except Slot Mask is turned on.
So in other words this is the first Slot Mask preset that I posted which works well with OLED, just with the layout switched to RGB instead. Look at how messed up it is.
CRT-Guest-Advanced - Slot Mask - RGB Layout
So, @MajorPainTheCactus it appears as though CRT-Guest-Advanced has a couple Mask Patterns available that actually work well with my 2016 OLED TV at least when it comes to displaying something that resembles RGB Phosphor Triads.
I was hoping to be able to recreate a similar experience using Sony Megatron Color Video Monitor by simply flipping the layout to BGR and using 300TVL Masks, however this wasn’t to be with the current implementation.
Perhaps there’s still room for improvement on this front for OLED TV users.
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So just as a quick response the last image has two problems: there looks to be pixels being lit up in the what should be pitch black lines between the phosphor triads on the left of the image.
The second problem looks like theres a row of pixels being skipped between the red and green phosphors. That is really quite odd. What resolution are you using this with? Do you have any scaling on?
I’ll take some photos of what I’m seeing my end because this doesn’t look like problems caused by the RGBW quad of an OLED.
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Hi Cyber, could you do me a favour and label the images with Sony Megatron and Guest Advanced? Thanks!
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TV is set to pc input for 4.4.4, nvidia settings set to full rgb, 10bit. Gaming mode preset and Sharpness of 10 is default, less supposedly adds blur, but I can barely see any different between 0 and 100 anyway
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I thought it was aperture grill and I’m running at 4k. Here’s an image of stock Pvm 2730 (luminance and white at 700):
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It looks the same in dx12 with hdr enabled in windows
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None of the recent images I posted were from Sony Megatron Color Video Monitor.
All 5 of them were from the same preset using CRT-Guest-Advanced (via HSM Mega Bezel Reflection Shader).
I started off by asking @Wilch to post what he saw then I went through all of the HDR presets on Sony Megatron Color Video Monitor to see if I could get the same improvement that I got with CRT-Guest-Advanced by using 300TVL with BGR mask layout. I didn’t take pictures this time around but I did in the past and the results were no different. They’re just as off as what you’re seeing in @Wilch’s pictures.
The main takeaway is that CRT-Guest-Advanced with Mask 12, Size 1, BGR Layout appears to completely resolve or at least greatly improves phosphor and mask alignment when used with LG OLED TVs.
No other setting I’ve tried so far “fits” properly on my OLED TV. The results are all over the place even if all I do is flip the layout to RGB.
That is all that I was trying to demonstrate with my pictures.
I don’t think you’re understanding what I’m trying to show. These 2 “problems” are non-issues in the context of what I’ve been trying to say all along.
Compared to what it looks like with the Mask Layout flipped they’re perfectly fine. No other setting provides an evenly spaced triad.
This is not a subpixel accurate preset I’m using here so you might see stray subpixels being lit or not based on other shader features used as well as camera instability. That’s not the focus though. The focus should be that on both aperture grill and slot mask I was able to achieve an evenly spaced triad using CRT-Guest-Advanced on an OLED TV whereas using Sony Megatron Color Video Monitor I was unable to do so.
In conclusion, that suggests that if you wanted Sony Megatron Color Video Monitor to better support the peculiarities of OLED TVs, there might be some potential for improvement.
So you can see my testing, analysis and assessments as a proof of concept.
If you or anyone else would like to reproduce these exact testing conditions, I used the following CRT Shader preset and Video Filter combination which is available in my CyberLab Mega Bezel Death To Pixels Shader Preset Pack. Testing was done at 3840 x 2160 resolution.
CyberLab__Slot_Mask_IV_OLED_for_CyberLab_or_Core_Blargg_S-Video_or_RGB_Filter.slangp + Blargg_NTSC_Turbo_Duo_SNES_PSX_RGB_CyberLab_Special_Edition.filt
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@Cyber, I’m glad you are getting good results with your setup on OLED.
At the same time, since this thread is about the Megatron shader, it would be good if you could help keep the focus there, for instance if you want to show a direct comparison between guest and Megatron to show the differences that’s probably fine, but posting a bunch of things using a different shader confuses the focus of the thread, taking it off topic for those that are following it and adding confusion for those that are just starting to follow it.
If you can stay more on topic that would really help keep the focus on @MajorPainTheCactus’ awesome Megatron shader, and if you are trying to show something in comparison then direct comparisons would be helpful so there is less confusion.
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I apologize if there is any confusion or straying off topic but the Sony Megatron Color Video Monitor images for comparison were the ones provided by @Wilch.
Then zoomed in, cropped and reposted by @MajorPainTheCactus.
Sony Megatron Colour Video Monitor
The whole point and focus of all my related posts here about this have been about Sony Megatron Color Video Monitor and trying to see if it is possible through maybe some additional mask or layout options that it can bring about an improved experience for a wider subset of users including myself.
It was never intended to highlight nor promote another shader over, or at the expense of this one nor to confuse anyone especially new users. All external images were used for reference and illustration purposes only.
I initially posted one image which I thought was sufficient to prove my point, however when @MajorPainTheCactus indicated that it was a Slot Mask picture being compared to an Aperture Grill picture, I sought to take and post the 4 additional pictures with complete descriptions in order to further clarify what I was trying to demonstrate.
Perhaps some of these posts could be moved to the OLED Subpixel thread and from there I can always tag and communicate with @MajorPainTheCactus on these specific issues affecting OLED TV users of this and any other awesome CRT Shader out there!
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