This is something I have seen so many times. Being somewhat experienced at this point, I have learned how to deal with this (check at the end). But seriously, if you are a project manager in CG project, please do not do this.
The most common mistake in CG team management would be several people giving feedback to artists. Sometimes the people are supervisors of other projects, other artists or some non-CG people who just want to chime in how they feel about the work being done. This is extremely annoying for artists, especially when the feedback from several people is conflicting.
The feedback must come from a single source, the person giving it usually being CG supervisor or art director. Actually if the pipeline is somewhat simple, it doesn’t matter so much if the person giving feedback is really hands on with the project, as long as the person takes responsibility of the feedback. It is no good confirming the work done is okay, only to return to artists with changes a week after. If it is good, then it must be considered as approved work, and further changes must be acknowledged as extra work.
Also if you are CG artist on a project, please do not waste time commenting on others work in company Slack, unless that is specifically required by the lead for some reason. Throwing thumbs up is okay, but even positive feedback can throw off what the actual supervisor has to say. If you notice issue with someone’s work that would have easy fix, feel free to throw them a direct note, but do not pollute the Slack channel.
I have seen this so many times that now usually when this happens, I usually just stop everything I am doing, raise my hands and ask clear direction from the person in charge. But I have also brought up the issue with at least three companies in near past because this was clearly impacting the productivity in major way.
Be clear who is in charge of the particular project’s art direction and make sure your team knows.