NoLITS

This is an interesting new style that works in a way similar to LITS, with the exception that none of the tetromino shapes are available. Rules follow:

Shade some cells such that each outlined area contains exactly four shaded cells that form either a trimino or a pentomino . No 2×2 square can be completely shaded. All shapes must be connected to form a single group of shaded cells. Identical figures, regardless of rotation or reflection, cannot share an edge. Any Xs mean the cell cannot be shaded.