When import mesh as “obj” , most of user may use blender wavefrontobj importer-exporter add on.
(default active). there is “Clamp size” option. Blender manuall not show clear how it work,
but there is no other option, which can change scale of import obj, But it not work to adjust scale as user intended.
- add cube and keep default size. (or set 2, 2, 2, boundary cube)
- export the cube as wabefrontobj with Scale 1.00 then save as cube.obj
3 import the cube.obj with change clamp size values. from 0, 0.3, 0.5, 1, 3 etc.
4 clamp size value = " 0.01" , imported cube scale = 0.001
5 clamp size value = “0.1”, imported cube scale = 0.01
6 clamp size value = 1.0, imported cube scale = 0.1
7 clamp size value = 1.1 imported cube scale = 0.1
8 clamp size value = 1.99 imported cube scale = 0.1
9 clamp size value = 2.0 improted cube scale = 1.0
7 clamp size value = 10 improted dube scale = 1.0
8 clamp size value =100 improted cube scale = 1.0
(as default clamp size value =0 , imported cube scale = 1.0 (no change scale)
I understand, clamp size work to adjust scale with a kind of rule or formula.
but even though it has mathmatical meaning, there is almost no meaning for practical usage when user need to import mesh with scale user defined.
About blender obj importer, we can not import mesh with scale as we need.
Of course we can adjust scale, after import obj, but may better just offer “scale option” to import obj in spite of “clamp size”.