/cgl/ - Cosplay & EGL

Complete beginner at armor making here. I know how to make armor that follows my body's contours exactly (duct tape dummy -> pattern method) but how do I go about creating a pattern for a piece that isn't entirely form-fitting but also has a curved sillouette? Pic related is what I mean in an exaggerated form, the yellow being the outline of the piece of armor. I've tried padding the area with clothes or shredded newspaper and then making a second duct tape dummy over the padding but I can't get it to look nicely smooth and curved.