I have brought this up SEVERAL times.
I can't fucking stand the black borders and the dull color palette Nintendo forces in all VC releases.
Take a look at this thread:
https://gbatemp.net/threads/understanding-and-changing-snes-vc-rpx-settings.425474/
You can see towards the end pages that some people tried it for N64 games, but didn't continue with it.
I want just 16:9 output and the removal of the gamma correction, that's it.
The best way to go about it is by taking the latest compiled VESSEL.RPX file, which is found in F-Zero X, and decrypt the file using this:
https://github.com/BullyWiiPlaza/RPL-Studio
With that, someone who has sone knowledge in ARM assembly could hack the decrypted RPX file to support 16:9 forced resolution, like what was done with both NES/SNES.
I have the faint idea about how to go about it, but my lack of knowledge on ASM/ARM assembly is just next to zero. Basically, with something like IDA Pro and the decrypted VESSEL.RPX file, you can start looking around for the values of the current resolution, like 640x480 in HEX values and try changing it to 1280x720, then re-encrypt the file and test it in Loadiine to see the changes in actual hardware.
Maybe testing with Cemu is an option as well.
Please, I beg to someone who has the knowledge to help out to accompish this