Only back faces are selected with an orthographic camera.

[BenCantCode]

Using a perspective camera in the mouse_picking example, the debug cursor points towards the camera when the sphere is hovered over. Using an orthographic camera (OrthographicCameraBundle::new_3d()), the cursor is instead placed on the side facing away from the camera. Here's a screenshot of what this looks like:

This issue also seems to affect bevy_mod_picking.

[aevyrie]

Thanks for the report. I'll take a look.