Intrusion zone geometry

[macman]

I'm disappointed to discover that my DS-2CD2543G0-IS [v5.6.3] throws off an error when I try to configure a concave quadrilateral as an intrusion detection zone (allowing me to avoid some heavy foliage) since it apparently can't cope with reflex angles. Since I can't configure multiple intrusion zones, this forces a smaller zone than I want. Short of covering the required area with different types of motion detection, is there any way around this?

 

[fullboogie]

Same problem at my front door. I just make up for it with line crossing.

 

[JB1970]

Same here it's a pain. I have intrusion detection, line crossing and PIR and I still struggle to get reliable, false alarm free detection due to the camera viewing angle, position of my parked cars etc. Probably easier just to get a security guard in my case