What does it mean - "Please improve your presentation rendering. (it's aliased)".

Hello everyone, dear professionals.

I am new to the site and I have a question for you.
I will be very grateful for your answer.

I have placed three 3d models on Envato Ocean.
One model was accepted and two models were not accepted with a comment:
“Please improve your presentation rendering. (it’s aliased)”.

However, all three models are of the same quality.

I have this question:
What does it mean - “Please improve your presentation rendering. (it’s aliased)”. I mean - “presentation rendering”.

and which file do I need to fix?

Thanks for your time.
Regards,
Eduard

I’m not a 3D Ocean author but my guess is they mean the preview of the item? It looks low resolution/pixelated or has aliasing artefacts.

Hello!
Thank you for your answer!
But I did it in the previous case. It didn’t work.
Which file do I need to fix? It is important.
Do other files need to re-upload or just the one that needs to be fixed?
Thank you very much again.
With best regards,
Ed