Blocky Shadows

[NorthVisualStudio]

Hi, I have a vray plane light behind three windows, it's set to exclude the glass but creates blocky shadows. The light and the glass are basic settings, rendered with Brute Force.

The attached image is the render pass for the light causing the blocky shadows. If the glass geometry is hidden - the blocky shadows disappear.

Does anyone know why this is happening?

Thanks,N

[hermit.crab]

Could you send the scene via the contact form so we can take a look? Mention me and include a link to this thread.