In the case of modeling clay, it indicates that we will create excellent projects and we will reach triumph. If it is very liquid mud, the one that makes you filth, it portends fall into immorality; although it is always possible to regenerate.
Dream dictionary: modeling dream meanings
If we look at sculptures, it foretells useful and pleasant relations. If we see ourselves making a sculpture and recognize the persons we are modeling that expresses our desire to educate and shape their characters.