Are my plants leaves turning yellow?

Wow them pics you posted are amazing man, Ive never seen anything like that before. How the hell do leaves split in colour like that, very interesting, wonder if them strains are any more potent? Are they your plants in the pics shown??
 
I wonder if indica or sativa are more prone to these genetic mutations or if its just the breeders doing some werid things. Do you think that you could by any chance share some tips with me maybe on how I could go about cooling a grow tent?
 
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