Shadow clipping in VR

[Highwayman-Ed]

Experienced a problem today in the UH-1 where when the cockpit is in shadow and moving your head around, the shadows on the periphery of your vision don't render along the very edge of the outside of each eye.

 

For example, with the sunlight off my right side, the very left side of my left eye has a very narrow vertical band that has no shadows at all and the section of cockpit appears in full sunlight. It's not always present, it seems to flicker in and out as you rotate your view.

 

Edit: Got it! In both of these images the band on the left side of the image should be in full shadow. In both cases, it was a very specific area where I had to look at the exact right angle for the issue to appear and as I moved my head around, it ONLY appeared in this location looking at this small area. If I moved my head in only a degree or so in any direction, up, down, left or right, it rendered the shadow correctly.

 

 

Excuse the rudimentary sketch, but the image below may explain the angles and method involved in seeing the problem. It seems to be when the light source itself is 180 degrees behind the viewpoint at the edge of the FOV for the VR headset where it is generated.

 

Edited April 17, 2018 by Highwayman-Ed