Godot: Shadow glitch

[MadIcecream]

Operating system or device - Godot version:
windows7 x64
https://bintray.com/calinou/godot/editor/2017-07-24.11c14b8

Issue description:
Look at the shadow, it looks like be cut at half.

Steps to reproduce:
Import the project provided below, and open Game.tscn.

Link to minimal example project:
WeirdShadow.zip

[ghost]

Bisection says 9483613, but I'm not really sure since this scene uses MeshInstance with plane mesh, which doesn't exist before that commit, so I tested with TestCube instead. The glitch isn't as bad as shown. So I'm not sure if the issue comes from that commit or before that.

[djrm]

it might be caused by the lack of contact shadows.
https://twitter.com/reduzio/status/829151000007151616

i have a similar looking scene that can be fixed with contact enabled, except for this #9740

[Zylann]

It looks like shadow bias is set too high. If you use a directional light you can tune it down to reduce the gap drastically. Only then, see if you need contact shadows.

[djrm]

@Zylann thats true, but by default is set to 1, so maybe a better default would be 0.08, it makes shadows look way better.

[reduz]

I don't know what the best defaults are, any help regarding testing, checking the value other engines have as default, etc. would help

[reduz]

closed via a1d7c496b