Felix,
I am guessing that the oversize sea sector is getting dropped somehow by the clipping. Hopefully, WanMil will issue a new version that only bloats the sea box when MP is being used.
Yes, I changed his code so that it only bloats the sea sector when using multipolygon for the sea generation and generate-sea=polygons works again: if(generateSeaUsingMP) { // the sea background area must be a little bigger than all // inner land areas. this is a workaround for a mp shortcoming: // mp is not able to combine outer and inner if they intersect // or have overlaying lines // the added area will be clipped later by the style generator (?) sea.addPoint(new Coord(nw.getLatitude()-1,nw.getLongitude()-1)); sea.addPoint(new Coord(sw.getLatitude()+1,sw.getLongitude()-1)); sea.addPoint(new Coord(se.getLatitude()+1,se.getLongitude()+1)); sea.addPoint(new Coord(ne.getLatitude()-1,ne.getLongitude()+1)); sea.addPoint(new Coord(nw.getLatitude()-1,nw.getLongitude()-1)); } else { sea.addPoint(nw); sea.addPoint(sw); sea.addPoint(se); sea.addPoint(ne); sea.addPoint(nw); }