Unity: Importing objects

Import objects from modelling softwares.
supported formats: Sketchup,

Three methods
1. Drag and drop the file into the Project window
2. ‘Import New Asset…’ via Project window’s context menu
3. Click on Assets -> Import New Asset.. from the menu bar

 Refer to this UNITY website for further details: http://docs.unity3d.com/Manual/HOWTO-ImportObjectSketchUp.html

Limitations
GIF textures are not supported

Lines are not imported
2D components (Text, dimensions) are not supported
Dynamic components are not supported
Attributes are not imported into Unity
SketchUp Layers are not imported
SketchUp Shadow settings are not imported
SketchUp Drawing Styles are not imported
SketchUp Section Planes are not imported
SketchUp Animation settings are not imported
Limited SketchUp Scenes data are imported

follow this link for a complete bio of component based thinking within UNITY if your unsure or new to the concept: http://gamedevelopment.tutsplus.com/articles/unity-thinking-with-components--gamedev-12492