Homebrew SNES9x for Old 3DS

FanNintendo · Wednesday at 6:21 PM

matbo87 said:
The dimensions are shown in the setting descriptions.
Game Screen BG: max 448x256px
Second Screen BG: max 400x240px

I’d recommend using exactly those sizes, but smaller images work too.
Also, it’s best to pre-dither the images, otherwise gradients may show visible banding on the 3DS.

I own N3DSXL and I run on asus rog gaming laptop and installed the latest python version. Microsoft wouldnt let me install the imagemagick.exe but I found the zip and extract it. I dont know how to run in powershell or cmd with imagemagick? Any tips or advice ? thanks.

matbo87 · 2026-07-17T14:15:33+0100

FanNintendo said:
I own N3DSXL and I run on asus rog gaming laptop and installed the latest python version. Microsoft wouldnt let me install the imagemagick.exe but I found the zip and extract it. I dont know how to run in powershell or cmd with imagemagick? Any tips or advice ? thanks.

something like this should work via cmd:
"C:\path\to\magick.exe" "C:\path\to\input.png" -channel R -ordered-dither o4x4,32 -channel G -ordered-dither o4x4,64 -channel B -ordered-dither o4x4,32 +channel -strip "C:\path\to\output.png"

In the end you may not need this at all. If your backgrounds already look fine and you don't see color banding, you can skip the pre-dither. It's only a tip for images that struggle in 16-bit color. I recommend reading this one here: https://lvgl.io/blog/tutorial-dithering-16bit

Homebrew SNES9x for Old 3DS

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