There is a lot more to making your own textures than changing opacity and blend modes. You could also adjust levels, change the hues, sharpen, blur. It takes a good eye to see what references you use can be used and what cant. And sometimes you will use a texture you wouldn't think to use. Racer445 has a great tutorial on…
@RJBonner I made the tank and created the UV through unwrapping in 3ds max. @Super Happy Cow the model isn't for any game.I was just trying to improve my portfolio,fresh out of school.Any advice you can give on how I can avoid the same mistakes next time, or tutorials you can point me towards would be greatly appreciated.