I am trying to print several parts on my Elegoo Mars 3. When I support them, the parts come out fine. On the other hand, when not using supports (with 2 mm walls), a horizontal line appears in the same place and I don't understand why it appears. Could someone help me solve this?

Photo of a resin printed model without supports and a horizontal line appears

Photo of a resin printed model with supports and no horizontal line is present



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