<html><body><div id="zimbraEditorContainer" style="font-family: arial,helvetica,sans-serif; font-size: 10pt; color: #000000" class="2"><div data-marker="__QUOTED_TEXT__">Hi everyone, <br><br>I have configured a mapcache server with a few sources. <br>Everything seems to work fine except for some wmts sources : i get random purple/blue artifacts on tiles (screenshots : https://imgur.com/a/hXgWxao) <br>So far i tried playing around gdal_wmts xml config file, with different caches (disk, sqlite, memcache), formats (png and jpg, with rgb and ycbcr colorspace) and grids, and also tried updating gdal. <br>Strangest thing is that artifacts disappear on tile expiration or by manually deleting tiles. <br>Right now i’m thinking about network issues. <br>Has anyone ever encountered these kind of artifacts ? <br><br>Thanks ! <br><br>Yoann<br></div></div></body></html>