Unity3D and the right scaling for objects

When i create 3d objects for unity3d, buildings or other things.

How can i be sure that i have scaled them to the right size ?

 

Unity's unit setup is meters.

 

Unity unit is meters, but I believe you want to know how to make sure your models will be imported to Unity with the proper scaling, right?

When importing models you have the scale factor. As far as I know you need to setup the unit properly when exporting your model from your modeling application (like when creating a FBX from 3ds Max).

What I did once was... assuming that 1 unit = 1 meter in Unity3d, I created a sphere in my modeling application with 1 meter diameter. Then I exported it to FBX and imported it into Unity. Then, I created a cube (in unity) and scaled it to 1. I centered two objects at 0,0,0 and noticed that they were not matching... so I had to change my scale factor on my Model to 1. After that, it started to make more sense (by default the scale factor was 0.1).

 

I like the idea with the sphere !

Thanks !

 

Unity 5 fixes this discrepancy in scale. Max 1 meter unit scale is equal to Unity 1 meter unit scale.
In Unity 4x - Max 1 meter unit scale was equal to Unity 0.1 meter unit scale.

 

Very good point theANMATOR2b. Thanks for the information.