q3map2 lightmap xincrement

                /* walk the origin around the lightmap */
                int xIncrement = MAX(1, lm->w / 15);
                int yIncrement = MAX(1, lm->w / 15);
                for ( y = 0; y < yMax; y += yIncrement )
                {
                    for ( x = 0; x < xMax; x += xIncrement )
                    {
                        /* find a fine tract of lauhnd */
                        ok = TestOutLightmapStamp( lm, lightmapNum, olm, x, y );

                        if ( ok ) {
                            break;
                        }
                    }

                    if ( ok ) {
                        break;
                    }
                }