But in order to give appropriate advice; are you going for a more realistic approach, or are you trying to recreate the N64 version with that level of detail?
You sir nailed it! i was thinking the same thing, texture wise for N64 your good!
Looks really good for N64 Graphics, if you existed long before our time you would have created Battle Field 64 or Halo 64 or Even Call Of Duty: Nintendo 64! xP but thats just a theory… Good job.