Shadow Problem with Toon Shader Material

[Niels]

Hi,

I hope this is the right forum, as I am not sure where the problem comes from.

I am using the "Toon Shaded" material and get strange shadows. Looks like the cast shadow is much stronger than the self shadow and the cast shadow is not shown where a self shadow is.

To be able to clearly see what's going on I amplified the shadows.

I am using a HDR for lighting.