I would like to make it my main level editor however i'm running into a problem: I'm unable to update(replace) the meshes that I imported in MAST. 

I tried pretty much everything I could, ending up getting these errors, rendering me unable to proceed on the prefab creation tool:

- NullReferenceException: Object reference not set to an instance of an object

- MissingReferenceException: The object of type 'Material" has been destroyed but your are still trying to access it.

It seems that MAST is detecting and trying to add the previously created prefabs, present in subfolders, causing conflict. Is that it ?

Sometimes however it worked, more or less: the level I build kept the prefabs in the hierarchy window, but does not display any meshes in the unity editor. 

And in the worst case, I'm getting lots of meshes stacked at the same place once done importing.

I have no idea what's going on or what I'm doing wrong. Is there a proper way to do so ?

I create a platform (merging some models) and I attach it a script so it can move... Now, I'd like to create a prefab in order to place more platform like this, so I drag it from hierarchy in the folder but the prefab that will be created it's without meshes... Someone can give me a solution to this?

PS: I tried to use some other tools to export the mesh but then I lose uv mapping.

Your tool is incredible and very useful, a lot of stuff there ready to use for building amazing levels. I'm only using it for a few minutes and i'm already convinced that i will use it all the time. Thanks for all this hard work !

Just wanted to say that I'm using URP on my project, and your new Surf Material is not supported.

I've created a ShaderGraph version of it using an Unlit Node. Works for me. If anyone needs or wants it, I can share!

Thanks for your amazing contributions. My "map per hour" time has skyrocked using your tool!!!!

Do you consider creating a supportive guide regarding creating models/textures that are just made to work perfectly with MAST?

Why?

You already got some experience creating a hand full packages. Yet their styles are a little bit different. Please share what you consider working best with MAST.

I've personally never created any game level ever. But I like grid styles in general (like web design) and damn I like using modularly usable things.

Value!

So I think alot of people using MAST will start thinking about this approach. Also I think if the creator of MAST would share some of his toughts and experiences of making modular models would be a great plus (and brings some traffic in).

Is that something you would work on?