It was brought to my attention that a few of your WiPs had improper preview/render images that went against site rules. In case you may have forgotten, rule 1.5 for the WiPs section states the following:
You're allowed to submit up to 32 screenshots along with your submission. You must upload at least one screenshot or render and it MUST show your work. Generic screenshots are not allowed.
Since the render/preview image is considered as a screenshot for WiPs, this rule also applies to the render/preview image. Try to keep that in mind in the future.