I've been wanting to build my own maps for some time now, and I've started on a few little projects to actively learn it. I've learned how to edit terrains and map textures, I've learned how to add music, I've learned how to add objects, and I've learned how to add skies and weather. Even so I've learned these, I still want to reach a deeper level of map making, so I'm going to list the things I feel I need to learn. If anyone can help me out somehow, please comment below.
1. How to make and use particles. I want to be able to make my own particles to use for objects and weather. I haven't been able to find a tutorial on this so far.
2. How to make my own skies. I want to have a night sky all the time for starters, but mainly I want to know how to make my own custom skies and then add them specifically to my map.
3. How to properly export my map. I ran a few tests with my maps already and exported what I believe was all the necessary files for sharing. However, when my friend tried entering on her computer, her game ended up crashing. Later, when I tried exporting the actual folders for the maps directly from the terrains folder, along with the .cfg music folder and sounds, it worked on her computer once. Then later, when she tried to enter again along with me, it made her crash again.
4. How to make my own markings and presets. I haven't looked for tutorials on this yet, and I was mainly trying to focus on areas concerning map building, but I figured I'd include this as long as I'm trying to figure things out. Additionally, I feel learning to make markings and presets will give me a better understanding of how editing and customization of this game works (along with a better understanding of how computers and files work).
5. How to make objects/meshes.
6. How to make textures.
7. How to make items.
I think that pretty much covers anything, once I've learned these I'm sure I'll only have more questions, but I'll cross that bridge when I come to it.