My mountains are dissapearing
(this tittle looks like a bad adaption of a Lovecraft story)
Hello, first of all, i'm french, so my english might be broken sometimes and it might be a really good reason as for why I can't find what i'm looking for.
I'm building my first map, so I've been watching the tutorial videos here https://www.youtube.com/watch?v=LlpfzlsMK2g , but i'm facing something that will probably have an easy explanation, but it's been almost a full hour since I started searching for the solution, trying things, and I can't get it to work.
Why are my mountains dissapearing everytime I scroll? not just the mountains actually, but it's usually better to start by adding the moutains before the rest when making your map (or so i've heard)
As I understand it must be a problem with the "sheets and effects" but nope, I can't understand what I have to clic, place or summon to make it work...
If someone already asked, and someone already answered, i'm sorry, I've searched but didn't find anything.