Here are the steps I think should be taken to reviewing your textures, and making sure they look good enough for submission. Is the shading/lighting right? I could write an essay on this. Item light sources are in the upper-left corner. Block light sources should be in the center or above, the texture, but they can also be in the upper-right corner. Shadows go in the opposite direction (except for parts of the texture that are indented). Any part of the object that is 3D at all must have shading and/or highlighting. This means no rotating copied textures, as it could mess up the lighting. Shiny materials have gradients with the lighter part towards the light source. Parts of the texture angled towards the light source should be lighter, while parts angled away should be darker. Parts of the texture that stick out or are in front cast shadows. Does the overall texture look right? Could anyone look at that stone brick and say, "That's made of stone"? Do the edges look even? Are symmetrical textures really symmetrical (and should they be symmetrical anyway)? Pay attention to any little detail you can find. Perfectionism is your friend here! Also, look at the texture on both a black and white background (and any other background you like). Does the texture look like what it's meant to be? If any Minecraftian can recognise that magma cream from 10 metres away, you're doing this step right. Does the texture look tangible? Image it in the real world, exactly the same as on your screen. Could you reach out and touch it? Would it have the same texture you want it to? Or would it be like paper (because you didn't add proper shading, naughty you ) Check with a good reviewer. Fortunately we have some reviewers with us (Valsis and Sheynx), so all you have to do is pay attention to their advice. And pay good attention, they know what they're talking about!