Some familiarity with RetroArch is beneficial. I have tried my best to lay everything out step by step, but I hope you can fill in the gaps if I forget something.
These overlays are derived from the work of 1playerinsertcoin, with bezels added from mugwomp_93 and drkhrse.
These overlays have been adjusted and tested to fit Miyoo Mini v1/v2/v3/Plus, Retroid Pocket 2S, and RG405M. For the Miyoo Mini/Plus, OnionUI outputs GB/GBC 2 pixels left of center. Therefore, you will need to download specific overlays in the miyoo folder for these systems.
These overlays should theoretically fit other 640x480 displays with standard RetroArch build, but they've not been tested.
| Perfect_CRT | Perfect_CRT-240p | Raw |
|---|---|---|
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| Perfect_DMG-EX (mugwomp) | Perfect_DMG-EX (drkhrse) | Raw |
|---|---|---|
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| Perfect_GBP-EX (mugwomp) | Perfect_GBP-EX (drkhrse) | Raw |
|---|---|---|
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| Perfect_GBC (mugwomp) | Perfect_GBC (drkhrse) | Raw |
|---|---|---|
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| Perfect_GBA (mugwomp) | Perfect_GBA (drkhrse) | Raw |
|---|---|---|
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Pick which version of the overlays you want, e.g. drkhrse or mugwomp93. Save both the .png and its .cfg to a perfect_overlays folder. For the Miyoo Mini/Plus on OnionUI, download the GB and GBC overlays specifically from the miyoo folder.
For the RG35XX-SP, you now also have the default GBA SP overlays seen in all promotional video with Perfect_GBA grid added. Find this in the misc folder. Thanks to u/N4riN4ri!
On Android RetroArch installations, transfer the folder to /data/user/0/com.retroarch/overlays (default), or set your custom location.
- To find the default location, go to Android file manager, swipe from left side of screen, scroll to the bottom of the pullout menu, and click on
RetroArch
On OnionUI for Miyoo Mini, transfer the folder to RetroArch/.retroarch/overlays
On your device, start a game, then access RetroArch Quick Menu by your hotkey, then choose On-Screen Overlay > Display Overlay ON > scroll to Overlay Preset, and find the appropriate overlay
Next, ensure the following settings:
- Overlay Opacity > 1.00
- Auto-Scale Overlay > OFF
- Auto-Rotate OVerlay > OFF
Then go back one menu > Overrides > Save Content Directory Overrides. You will need to repeat this step after every configuration change
Settings > Video:
- Integer Scale > OFF
- Aspect Ratio > 4:3
For SNES and NES, by default 8 pixels of overscan is cropped. This results in non-integer wonky scaling, which is evident in the "Mega Man life bar" test. For these, you may set the following:
- NES (FCEUmm)
- Core Options:
- Video > Crop Vertical Top/Bottom Overscan > 0
- Manage Core Options > Save Game Options OR Content Directory Options
- SNES (snes9x)
- Core Options:
- Crop Overscan > OFF
- Manage Core Options > Save Game Options OR Content Directory Options
Make a palettes folder in your BIOS directory and copy ONE default.pal (either DMG or GBP) into BIOS/palettes.
Alternatively, for GBP I found that the shader handheld > gb-palette-pocket gives a more muted look. Turn GB Colorization OFF if using this shader.
Core Options: (Gambatte)
- GB Colorization > Custom
- Color Correction - Frontlight > Above Screen
- Interframe Blending > Simple (Miyoo Mini) OR LCD Ghosting (Fast) (More powerful systems)
- Manage Core Options > Save Content Directory Options
Settings > Video:
- Integer Scale > OFF
- Aspect Ratio > Core Provided
Also for standard RetroArch builds, set:
Shaders:
- shaders_slang > interpolation > sharp-bilinear-2x-prescale.glsl
- Alternatively, use the sharp-shimmerless shader from Woohyun-Kang/Sharp-Shimmerless-Shader
Core Options: (Gambatte)
- GB Colorization > GBC
- Color Correction > GBC Only
- Color Correction - Frontlight > Above Screen
- Interframe Blending > Simple (Miyoo Mini) OR LCD Ghosting (Fast) (More powerful systems)
- Manage Core Options > Save Content Directory Options
Settings > Video:
- Integer Scale > OFF
- Aspect Ratio > Core Provided
Also for standard RetroArch builds, set:
Shaders:
- shaders_slang > interpolation > sharp-bilinear-2x-prescale.glsl
- Alternatively, use the sharp-shimmerless shader from Woohyun-Kang/Sharp-Shimmerless-Shader
Settings > Video:
- Integer Scale > OFF
- For Miyoo Mini:
- Video Filter > GBAOffset.filt
- For Standard RetroArch:
- Aspect Ratio > Custom
- X Position: 0
- Y Position: 0
- Width: 640
- Height: 427
- Aspect Ratio > Custom
Core Options: (mGBA)
- Video > Color Correction > Game Boy Advance
- Video > Interframe Blending > Simple (Miyoo Mini) OR LCD Ghosting (Fast) (More powerful systems)
Also for standard RetroArch builds, set:
Shaders:
- shaders_slang > interpolation > sharp-bilinear-2x-prescale.glsl
- Alternatively, use the sharp-shimmerless shader from Woohyun-Kang/Sharp-Shimmerless-Shader
Credits: