@ Y-Phil   

I'm so curious that I'm asking you.

How did you manage to lighten the shadow on this link(https://www.renderosity.com/forums/threads/2954843/poser-12-renders?page=9)?

I tried Poser's default round ground plane HR like you said, but it didn't work in P13.

I wonder how people can get a light shadow in P13 if they use background node + the round ground plane in shadow catcher without using startup scene.