Added an additional warning

Docs/Architecture.md

@@ -90,6 +90,8 @@ Mesh shapes also cannot calculate their mass and inertia, so when you want a dyn
 
 An example can be found [here](https://github.com/jrouwe/JoltPhysics/blob/master/Samples/Tests/General/DynamicMeshTest.cpp).
 
+Note that you should try to avoid dynamic mesh shapes as they are fairly expensive to simulate. Also, mesh shapes don't have a clear inside/outside so a mesh is only considered to be colliding when one of its triangles intersect with the other object. This can result in objects getting stuck inside the mesh without knowing which way is out.
+
 ### Creating Shapes {#creating-shapes}
 
 Simple shapes like spheres and boxes can be constructed immediately by simply new-ing them. Other shapes need to be converted into an optimized format in order to be usable in the physics simulation. The uncooked data is usually stored in a [ShapeSettings](@ref ShapeSettings) object and then converted to cooked format by a [Create](@ref ShapeSettings::Create) function that returns a [Result](@ref Result) object that indicates success or failure and provides the cooked object.