A plastic molded trim panel for a vehicle provides a cover element formed as an injection-molded panel with a visible side and an underside. The cover element has a smooth outer rim region, a patterned central region, and an edge region between them. The patterned central region includes a first plurality of regularly-spaced holes disposed in the visible side with a predetermined pattern and having a first substantially uniform depth. The edge region includes a second plurality of regularly-spaced holes disposed in the visible side uniformly continuing the predetermined pattern and having a generally decreasing depth according to proximity to the rim region. The rim region is smooth on the visible side without holes. The decreasing depth of the holes allows an uninterrupted hole pattern to be used because the truncated holes at the edge of the pattern remain to be manufacturable using injection molding.