Oh wow, I really like how that whole customability stuff is working out. And if no textures fits Sonic R model, it's fine. And hey, besides that, so far it all looks really good. Keep it up.
Well, I should have been a tad bit more specific on the textures on the model's textures.
Since there was no textures that fit the model, I made my own using textures from 3 different models; Sonic R character textures (the textures exist, however do not fit the model, as in the texture coordinates were all smuged up), The Walls of The Void model, and Sonic Adventure 2 for customability.
In order from that gif, the clothes that Sonic wears are these:
1.) My own custom Sonic Jam texture -
In the concept art of Sonic Jam, and wallpapers from Sonic Jam, we see Sonic wearing these shoes. Could this have been the outfit they wanted Sonic to wear in Sonic Adventure? Who knows. All I know is, it looks epic in-game.
2.) Sonic R - This part of the texture was a mixture of the Sonic R texture, Sonic Adventure unused texture, and the Walls of the Void texture.
3.) Sonic Adventure - Simply taken the shoe texture and slopped it on
4.) Sonic Adventure 2 - Who doesn't like these shoes?
5.) Sonic Adventure 2 (Dreamcast) Gold suit - When playing in 2player mode of Sonic Adventure 2, the player (if you completed all the character's missions) can choose to wear a different outfit. For Shadow, he wore a Red combat armor, and Sonic wore a Gold armor with a scouter on his ear. I am yet to make the scouter on this version. (Anyone know where the original texture for this outfit is? D; its wipped off the face of the internet, not even the textures resource has it D;).