ED_view3d_win_to_3d_on_plane with do_clip enabled wasn't working in non-camera orthographic views as it didn't take into account the ray origin being centered to the view. Resolve by testing viewport clipping after the ray has been projected.
ED_view3d_win_to_3d_on_plane with do_clip enabled wasn't working in non-camera orthographic views as it didn't take into account the ray origin being centered to the view. Resolve by testing viewport clipping after the ray has been projected.