I’m required to do some geometric calculations here, and i’m wondering how VRay arrived at its sun penumbra angle (at 1.0) and what it is? For some reason I have a value of 1.5 degrees in my head but I forget where I got it from and I need to refer to some solid evidence!
The sun’s visible disc is 0.53 degress if I recall correctly, most applications use 0.5 degs. Both 1 and 1.5 degs seem a little off to me.