I think the stencil shadow has a bug. I have a stretched mdl cube as the ground and two small mdl reference objects aside. All objects have the Shadow flag on, and i have shadow_stencil = 2 in my main.c

When i run the project the groundcube casts itself as a shadow at itself. It is just visible from the angle of the lightsource. But nevertheless very disturbing.

Here the testfile, 200 Kb.

http://reinerstileset.4players.de/ext/3dgs/selfshadowing.zip

And the picture to show what i mean:

I believe it's not the groundcube shadow, but the shadow from the cap of the shadow volume that you're seeing here. It's not visible in a normal scene, but can be visible when you place the camera at the light position. It should go away when you use shadow_stencil = 1, which uses an uncapped volume.

I'll check if we can implement some settings for avoiding this artifact.

Thanks JCL

Hmm, i cannot walk into shadows anymore with shadow_stencil = 1; without being in trouble. I need shadow_stencil = 2; for that. So that`s unfortunately this workaround out

It has become very visible in a normal scene. Inside a shadow it inverts. Outside a shadow i can see the whole groundmesh as a little shadow. That's why i invested some time here to create a reproduceable result.



Avoiding this artifact would be really great