Why need set orign? When import model,orign need be set? When export model,orign need be set again? Which orign can be chosen when import or export? Thanks.

Hello atpo

Not sure I understand what you are asking did the origin move when you imported the model? I know that when importing to other software sometimes the origin is moved and that in other software the origin might need to be moved to the origin you wanted

Thanks. Yes,when importing to others,model isn't at origin.

OK that happens often with other applications and you will have to reset and move the origin point in that application I know this is very common with Daz Studio. Another thing you can try is before you export the model out of Blender make sure you set Scale and Rotation the key combo to get the scale rotation is in object mode and Cntrl A on windows and and on a Mac it is cmd A if not mistaken that might resolve the issue when of the origin point on export

Thanks. How to set correctly when import or export?Especially scale.

If you do the Apply rotation and scale you export normally nothing else you have to do but if you import it to another software and it changes the origin then you will need to change the origin point in that software and each software will have different methods on how to do that try applying the rotation and scale Blender and test exporting it out to the which ever software you are using and see if the origin stays where you want it if not then you will need to determine how to to change it in the software you imported to.

Thanks.