[Meshes] Add informtion about .3ds limitations

docs/zengin/meshes.md

@@ -16,4 +16,8 @@ These are the meshes that are used to create static (non-animated) objects in th
 
 ZenGin uses the `.3ds` file format for meshes. This is a file format that is used by 3D Studio Max. However, ZenGin compiles the `.3ds` files into `.MRM` (Multi Resolution Mesh) files, or embeds them into the `.ZEN` files.
 
-The `.3ds` files can be opened with any 3D modeling software that supports this format. But, to easily import/export them with engine-specific settings, it is recommended to use Blender 2.80+ with the [KrxImpExp](https://gitlab.com/Patrix9999/krximpexp) extension
+The `.3ds` files can be opened with any 3D modeling software that supports this format. But, to easily import/export them with engine-specific settings, it is recommended to use Blender 2.80+ with the [KrxImpExp](https://gitlab.com/Patrix9999/krximpexp) extension
+
+### 3DS limitations
+
+The 3DS file format has some disadvantages when building levels. With very large levels such as `SURFACE.3DS`, you reach the upper limit of 65,536 polygons per object that are permitted in a `.3ds` file. To get around this problem, proceed as follows: simply “cut” the mesh into several small parts that are below the 64K poly limit. For example, the `SURFACE.3DS` was dismantled into 4 parts of roughly equal size and then completely exported. This mesh is then melted together again into an object in the spacer. This happens due to overlapping vertices.