Dredging this topic back up since I haven't messed with this yet...
Can you use only canned loading animations or is it customizable?
EDIT: Let me qualify my question a bit more...
Can you specify your own loading image/animation?
Is there an option to display it for a certain period of time? This may seem like a weird ask...but...on faster x86 systems, the loading screen may be displayed for like a second which just seems silly.
@cyperghost I am curious what line you read in the OP's text that leads you to believe that. He said '40GB of custom games/settings', but I think he means that he has put a lot of work into his current setup and wants to fix it without starting all over again.
@Aaronero It's not the emulator that's showing the splash images, it's the Runcommand, so there's nothing that the N64 core (or emulator) is doing. Runcommand is using fbi to display the image on the RPI, but it's not doing any scaling by itself, it just tells fbi to try and zoom the image as best it can.
You didn't say anything about your system - as requested by https://retropie.org.uk/forum/topic/3/read-this-first - so you may not even be using the latest RetroPie or there's some other configuration that might interefere with the image splash.
@Capeman That's true but isn't that the same for some of the other options? If the option was included it would at least be noticeable that it's possible to deactivate the splashscreen.
I only found out that is possible to do so because someone mentioned it in some thread which I was luckily watching for some other reason.
@rbaker yes I read that mate, good advice but the (RetroPi) SD Card is totally unreadable in any OS I put it in 3 different SD card readers the pc does the 'dur doop' noise to signal new hardware detected but nothing, the best I had was 'removable disk' in Windows Explorer show up and I tried to format only to be told 'F is unreadable' I tried ChkDsk in DOS similar outcome ... All a bit brutal mate, time the SD card met the bin, but I would hope to not have to throw away the Pi too