I can't tell what's going on problem-wise in the one pic because of lighting. (It's in shadow so not much light is hitting it at all. Unless there's a lot of ambient light you're not going to see any textures in that case anyways.)

Also if the problem is showing in the render, it could be that you need to use certain patterns in channels other than diffuse or ambient. (Usually these channels use greyscale, with the higher parts of the relief being towards white and the lower towards black.) You may need to try working with bump, highlight, specular, shininess, and reflection channels. But those aspects are specific to various render engines. (It looks like a sim, in which case you may have better luck asking about it's particular renderer in the respective sim forum.)

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Barbequed Pixels?

Your friendly neighborhood Wings3D nut.
Also feel free to browse my freebies at ShareCG.
There might be something worth downloading.