My first White's TF,, need more? brown/gray/red coloration, bad?

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Is the glass wet? that could be the cause. My WTF is not much of a climber either. He's a little clumpsy and falls at times trying to reach places he can't/shouldn't (like climbing areas that would cause him to be upside down) I feel bad for him sometimes and realize his perches are still not optimum for his size, I replaced his rock floor with moss to cushion his falls.