arnold ginstance visibility and ginstance's node visibility

[xtvjxk123456]

in katana,two object,the polymesh and ginstance from the polymesh.Each has a point light source inside ,but it show different light effect.

after exporting ass from katana,i found ginstance's node visibilty become 0,and ginstance visibilty is 255 .

why?

[Stephen.Blair]

Original object is not rendered, only the instances are rendered.

Original object does not count as one of the instances.

[xtvjxk123456]

can instance's node object visibility effect shading ? i found it show different light effect when use instance or not.

not use instance, assigning glass material, shading and shadow is ok.

use instance, instance'node assigning glass material, shading is ok,but shadow is opapue.

(left side not use instance<->right side use instance)