I tried to use the xBRZ scaling algorithm (https://sourceforge.net/projects/xbrz/ ) to scale Chrono Trigger's opening animation to 6x (1536x1344) then to 4K using Lanczos (2880x2160).
Nearest neighbor interpolation version can be found here: • Chrono Trigger (SNES) Opening Movie
Do you prefer this compared to nearest neighbor interpolation?