Oh man. sweet turnout. glad you enjoyed the tut. regarding your texture i would say lower your cavity map a bit. you've got a lot of white streaks goin on with some blurry rock/dirt-ish details underneath. id say revisit your base, work it up nice as a diffuse (without AO or anything like that) and then start adding in your lighting/volume layers and adjust accordingly. nice that you've given it a go a few times. keep at it.
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