Would it be possible to add a 3DS geometry file for each scene, so that a 3D character can walk and project his shadow correctly in the surrounding environment?
Wintermute Engine (no longer maintained) had this feature almost 10 years ago. I've attached two screenshots to the message showing the effect, taken from a Wintermute 3D Tech Demo created by user DREAMWEB back in December 2007.
This would really be a lifesaver for people designing a 2.5D game with 3D playable characters (like AkcayKaraazmak and myself
The question is of course addressed mainly to SimonS.