Decorative panel and method for manufacturing a decorative panel

A decorative panel having a top surface and one or more sides, said decorative panel comprising a substrate, said substrate having a thickness, forming at least half the weight of the decorative panel and comprising a copolymer of unsaturated polyester and at least 4 weight parts of filler material per weight part of the copolymer, wherein said substrate comprises an integrated motif formed by a plurality of differently colored regions present at the top surface and continuously extending throughout the thickness of the substrate, wherein the integrated motif shows the image of stone veins of a marble, wherein the integrated motif, as seen in horizontal cross sections, is continuously changing throughout the thickness with said colored regions having a boundary at a first position in a first cross section and at a second position in a second cross section, wherein the difference between said first position and said second position defines a sideways sweeping of said boundary, wherein said sideways sweeping is less than twice the vertical distance between said first horizontal cross sections and said second horizontal cross section.