In addition to some wacky high lag on a larger map last month (not using that map currently to test), I'm having two issues: The first is the old "Advanced Fog of War isn't remembering explored areas" issue, pretty much identical to this thread , except I don't have the issue that was resolved (no owned tokens with sight). I have another game with pretty much identical settings that works - in fact, too well. The second is new (to me), where tokens are "exploring" areas they cannot see, past solid dynamic lighting barriers, no cracks. I captured a bunch of screen shots, that hopefully can explain it (haven't mastered capturing animated). Here's after freshly reapplying AFoW, watch the upper left, and then moving the token (fox) up one - compare the upper left. Here's the DL Since it was doing that, I tried added a new DL wall - and this actually "helped". With that in place, it wasn't revealing. but circling around made even stranger effects. I can accept seeing the single squares at the door, given the pixelated nature of AFoW. But the squares past? I thought maybe there was some undetectable leakage, due to the "blocks from the midpoint" change - so I made the lines very thin, but they still cross fully. Then I made the red line bigger, just in case. And got this. In another thread, someone mentioned "close parallel dynamic lines" might turn each other off somehow, (like two lines for a wall would let you see the wall from either side). If that's actually a thing, maybe that explains this, but I'm really at a loss. It's a moderately big map (60x150), but it's actually fairly empty given the size and I've used much bigger before without this happening (before most of the changes of course).