Hi Minko, your video shows exactly the problems that I saw with Andrzejs map before r4048 :-( I've noticed that your problems appear on the left side while those in Andrzejs map always appeared at the bottom. I've also noticed that in Garmin maps the DEM bbox overlaps the tile bbox on all 4 sides while with mkgmap and BuildDEMFile the upper left corner is the same. Maybe this should be changed. Reg. your changes on dist values: Hard to say. I also played with differnt dists on Andrzejs sample and the error changed (appeared at different positions) but never disappeared. Do you still have the previous mkgmap.jar? If yes, please try to find out and let us know the version. Gerd ________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk> im Auftrag von lig fietser <ligfietser@hotmail.com> Gesendet: Samstag, 13. Januar 2018 10:46:00 An: Development list for mkgmap Betreff: Re: [mkgmap-dev] mkgmap r4048 seems to fix problem with hill shading Hi, Today I uploaded my Benelux map but it shows some rendering issues when zooming in and out. I have compiled it with r-4048 https://www.youtube.com/watch?v=x6FAYUkPdYw The former versions didnt show this behaviour. I have also changed some dist settings, maybe this can be the cause? dem-dists: 3312,6628,9942,13248,44176 overview-dem-dist=88368 dem-poly: bnl_dem.poly