Why is this? If you set the origin to say the middle of the model, when you import it to Unity and drag them to your terrain / floor, the middle of the model will be on Y = 0, so you might have to drag your model up each time. In order to set the origin of the model to the 3D cursor: select the model, then navigate to Object > Set Origin > Origin to 3D Cursor. To be more precise, Open the View window and set the location of the 3D cursor manually. To change the origin in Blender, select the Cursor tool and click where you want to place it. This might not apply to all cases, but for instance if in Unity you’ll have the floor on Y = 0 (Y as in vertical coordinate), and your Blender model (in this case, a tree) will go on ground level as well, it’ll be much easier if you set the origin in Blender to the base of your model.
Set the origin to a meaningful position.If they already come with weird numbers in there this will be confusing. Why is this? In Unity you want to be able to apply transforms to your models.
On the Transforms panel, the values for Rotation should show 0 and for Scale 1 on all the axes. We are not using Blender to create a rendered scene, we just care about the model, so unless you are indeed doing other things with your Blender file, you can remove these elements.
Image credit: Primalshell, license CC BY-SA 3.0 2. In Blender, the Z axis points upwards, whilst in Unity, the Y axis points upwards.Blender uses right handed coordinate system, whereas Unity uses a left handed coordinate system (see illustration below).The first thing to keep in mind is that there are two main differences between the coordinate system of Unity and Blender.
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