First of all, I want to apologize because I am a beginner in this area and not a native English speaker, so sorry if I ask simple questions or if I am hard to understand.
So I have DEM files in the form of ASC files representing squares of 5 km and a resolution of 5 m (so 1 million points/file). What I want to do is import them in Blender to edit them and study them. I am able to convert the ASC files to TIF files and import them to as points cloud with the BlenderGIS plugin but then I need to skin them with a plugin which make mistakes and the files are far too large to be corrected manually. The other method i tried was to import the file in Blender "As DEM" and it work great but when I switch to edit mode, the mesh is flat and I cannot edit it the way I need. Do you see any method or tool that I can use to help me ?
As I said, I am a real beginner and I may have missed something obvious so if you think of anything please try to help me !