Lin O. said: Sorry... but I still have some problems. The following is the result of my multiple tests. a). The trap has spot DC 26, and a max search distance is blank. 1). Character one has perception +15 and Trap Spotter ability, but even if he is close to the trap 10 feet away, there is nothing happen, this is the result I have tested many times. But in theory he has a 55% chance to find the trap. 2). Character one has perception +16 and Trap Spotter ability, when he sees the trap, he automatically detects the trap, even if he is more than 10 feet away from the trap. But in theory he has a 45% chance to miss the trap. 3). Character two has perception +16 and without Trap Spotter ability, when he sees the trap, he automatically detects the trap, even if he is more than 10 feet away from the trap. b). The trap has spot DC 26, and a max search distance is 10 ft. 1). Character one has perception +15 and Trap Spotter ability, but even if he is close to the trap 10 feet away, there is nothing happen, this is the result I have tested many times. But in theory he has a 55% chance to find the trap. 2). Character one has perception +16 and Trap Spotter ability, when he closes to the trap 10 ft away, he automatically detects the trap. But in theory he has a 45% chance to miss the trap. 3). Character two has perception +16 and without Trap Spotter ability, when he closes to the trap 10 ft away, he automatically detects the trap. Is there a conflict or bug between passive perception and the trap spotter ability? Or my test method or my settings are wrong? Because in my test results, when the character's passive perception(10+perception) is greater or equal to the trap's spot DC, he can always automatically detects the trap, even he don't has the trap spotter ability. when the character's passive perception(10+perception) is lower to the trap's spot DC and he has the trap spotter ability, but he will never detects the trap. I made some changes to add the checkbox to disable/enable D&D 5 style passive perception. It might take a week or two for these changes to be merged into the API though, so until then you'll still be experiencing issues a2, a3, b2, and b3. For issues a1 and b1, I'm not sure what's going on. When the character with the trap spotter ability gets within 10' of the trap, you should see a whispered message to the GM informing you of the result of the perception check made with the trap spotter ability. If the character has already searched for this trap and failed, it will not try again next time they get within 10' of it. See if Trap Spotter works if you make a copy of the trap and delete the original one. That should reset the cached information for whether or not the character tried to search for the trap.