hdri lighting not making shadows.

[Whammy]

I don't know if the lightmap compression is on or off. I'm thinking it shouldn't matter since using the stock sky sphere and a direct light for the sun...

[Whammy]

I tried setting the skylight to static and got a black scene as a result. The scene itself is very simple. Just a plane with some cubes on it. Lighting...

[Whammy]

I'm playing around with HDRI lighting and I'm unable to get any shadows. I'm using an HDRI image which is a clear sky with a bright mid-afternoon sun....