How hard would it be for someone to make an app that loads one or two images in PNG, BMP, or JPG(whichever is plausible) to display in stereoscopic 3D on the top screen, taken from a server or maybe from your PC via FTP? Perhaps use the filename or a TXT file to determine the left/right eye separation for the picture even.
I keep wanting to make a computer program that takes a picture of a stereoscopic game on the PC, resize it to 3DS size, and upload it as an MPO to view in the 3DS browser, but I just can not manage to find a way to automate MPO creation, so it'd be nice to have something that just works from either one BMP with both eye images, or one for each eye.
Closest I can find is "3DViewer" and I can't actually find the download for that, plus I would need to exit and use FTBrony to re-download each time. Or maybe that CTR Streaming Server but I have no clue how that works, sadly.