A 3D dorm room model with adjustable furnitures
Some tips to optimize the material:


1. Each furnitures' location/transformation can be adjusted alone. You can rearrange the design of the room depending on you personal preference 

2. In the object list panel. you can unhide/hide objects individually (e.g: you can hide other parts of the material except the bed part to use it as a single model)

same method goes for other objects:

Material
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Default material
Allocate
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Default layout
Movable parts
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Movability