Should NPC's Have Sight in Dynamic Lighting?

Hi all, I'm setting up a game with some maps that will have dynamic lighting enabled and I'm wondering if the NPC/monster tokens should have sight and darkvision enabled? Does this have an adverse affect on game performance? My first thought was this would help determine if the monster can see the players but I can just wing it if it will cause performance problems. Wondering if anyone has any thoughts on this. Thanks!

It depends on your specific system whether it will cause problems.&nbsp; Not having npcs have vision that needs rendered is one of the performance tips. <a href="https://wiki.roll20.net/Optimizing_Roll20_Performance#Graphics_Rendering" rel="nofollow">https://wiki.roll20.net/Optimizing_Roll20_Performance#Graphics_Rendering</a>

It takes time to set up, is more graphically demanding, clutters up your screen more, and ends up being irrelevant in about 99% of cases. Thus, not worth doing. In my opinion, anyway.

There's almost no upside to DM controlled characters/token having lighting set up. You can already see for them. And it's a HUGE tax on system performance. You definitely recommend against it.

Great, thanks for the responses everyone!

By default, I do not give NPCs sight, for the reasons stated above. However, sometimes it becomes important to determine what exactly an NPC (or monster or whatever) can "see" during an encounter. When that situation comes up, I will temporarily turn on their sight, just to check. But eventually I will turn it back off again.

It is less of a performance sink than it was in legacy, I am told, but in my experience, it clutters up my view and gives non-intuitive views. A cavern filled with night-visioned kobolds looks brightly lit. I turn it off for NPCs.

This may also be a consideration: Community Forums: UDL 1.0 Updates, Bugs, &amp; Feedback | Roll20: Online virtual tabletop

I wing it. If it's really important I click on the character's token to see what they can see - if they can see the NPC, the NPC can see them! I did run a session where my goblin hordes had night vision turned on, and it was chaos!

I don't have the NPCs in any of my adventure products have sight for the reasons already mentioned. In game, if you need to determine what a creature can see, it is sometimes faster and more distinct to give it an aura rather than vision. Then its vision area will stand out against all the dynamic lighting in the room.