FOSS gamedev and creative worlds

Ok... what can I use to open the .mts schematics for trees?
I looked around and saw some articles claiming I could use Blender... (didn't work)... openshot, (didn't work), nothing I found worked.
Also, A question. I was trying to make some changes to trees. Basically removing acacia, and jungle trees... with the intention of having aspen, maple, oak, and pine.... I made all changes needed in mapgen and other files but, got hung up with the .mts I have never worked with this extension before. But that seems to be the only step hindering what I wish to do... (unless trees are hard-coded into the engine?, which I doubt)
SO, for now, my current work-around has been to just change the textures as a temp solution because I got frustrated :P
uugghhhh... help please

I run Mint

You could use wordedit to make new schematics, and I think Duane made a mod that makes minetest schematics as a .lua file.

Default tree (and logs, bushes, corals, large cactus, papyrus, waterliiy) schematic files are created from simple Lua tables using this mod https://github.com/minetest-mods/saveschems
Worldedit cannot set certain parameters so is of limited use.

D00Med wrote:You could use wordedit to make new schematics, and I think Duane made a mod that makes minetest schematics as a .lua file.

Thank you for the response..

paramat wrote:Default tree (and logs, bushes, corals, large cactus, papyrus, waterliiy) schematic files are created from simple Lua tables using this mod https://github.com/minetest-mods/saveschems
Worldedit cannot set certain parameters so is of limited use.

Thank you good sir. Now to see how much of a mess I can make with this.