3d render letters set rejected. Please tell me why

Hi! i’m new here. my very first work was hard rejected because of “it isn’t at the quality standard required to move forward”. please help me to understand what does this mean. i can’t see any quality issues here.
it is set of png files 3000x3000. made in 3d max, rendered in Corona.
preview images and 100% crop attached. thank you in advance!


It looks pretty good although things like the lighting don’t look 100% great to me. Also I think there are a lot of photoshop text styles on here that can achieve a look as good or better than that.

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thank you