[kreativasas]

Your 3D objects are probably organized in a hierarchical way - when you apply a transformation to a parent object, it will also transform all the child objects.

To get an overview of how your 3D objects are organized, I would recommend you to put a breakpoint after a line when you read the 3D object from file. Then start your application and when breakpoint is hit, open the Visual Studio Immediate window and then start the following:

readmodel3d.DumpHierarchy()

This will show you the hierarchy of the objects defined in the file.


Btw. why do you create the readmodel3d as Model3DGroup? 
You could just use: 

Code:

Dim readModel3D = assimpWpfImporter.ReadModel3D(mfile)
modelarray.Content = readModel3D

I'tried, but the immediate window says 'DumpHierarchy() is not a member of Model3d' !!
HELP!