Hi all.
I encountered a strange problem with shadows, when field of view is small. When fov is 70 or 80 degrees there is no problem, but when I decrease it, lets say 50,55 degrees, shadow bugs (may) occur. First I thought it may be a problem related to our custom models or daynight script. But then I performed some tests on Editor and reproduced the bug.
Create a terrain in editor. Drag atmoshpere and directional light. Drag in the monster truck (a little higher from the surface to see its shadow easily). Configure editor field of view to 51 degrees. Move back and forward in the direction of monster truck. You will see its shadow partially or fully disappearing based on camera distance and viewing angle.
Strangely, one of our custom models, (airport bridges) do not produce the same shadow artifacts. Maybe it is related to pivot point ?
Here are 2 video links showing monster truck with shadow bug, airport bridges without shadow bug :
ftp://81.214.87.33/
port:21
username : katron
pass : katron2012
filenames :
FOV_SHADOW_PROBLEM.avi
FOV_SHADOW_PROBLEM_2.avi
Here is a screenshot for a quick glance: