Controls
Result
FAIL
No valid back-of-head path found.
Back-of-head coverage
0.0
%
0
/
0
samples visible
Left Pivot Mirror
Wall mount X (in)
Yaw (deg)
Right Pivot Mirror
Wall mount X (in)
Yaw (deg)
Head Position
Head X (in)
Head Y (in)
Head rotation (deg)
Display
Draw sample rays
Samples (back arc)
Zoom
Auto-find best
Reset defaults
Center view
Notes:
The central mirror is fixed on the back wall (bottom).
The left short wall blocks rays (and mirror placement) for y = 0..11 at x = 0.
The right side is open (no right wall).
PASS means at least one honest two-bounce path exists: back-of-head → side mirror → central mirror → eyes.
Top-down view
. Back wall at bottom. Person faces downward toward wall.
Walls
Mirrors
Valid ray
Blocked/invalid