I've recently downloaded the most recent demo of 3DNES (v1.4.0, right on the front page), but unfortunately, I've been having some issues when it comes to the textures on the 3D models created out of the sprites. The emulator seems to be able to show shades of blue and sometimes green, but nothing else.

Super Mario Bros. Title Screen

Super Mario Bros. 2 In-Game

Super Mario Bros. 3 World 1 Map

Super Mario Bros. 3 In-Game

Legend of Zelda In-Game

All four of the games look fine on a normal 2D emulator like Nestopia. Is there anyway to fix this?

What's your Mac spec?

Well, I updated my computer and redownloaded the program, and now it works like a charm.

I was only a few versions behind (bugs were on OS version 10.12.3, now on 10.12.5), but that could have very well been the source of my issues. 

I have same problem with 3dnes v1.4.0

My OSX version is Yosemite(v10.10.5)

any luck?