Well, I can't show anything in Roll20 because I can't get it to work, and I can't do it in another program because, well, I suck at graphics other than taking screenshots. :-) But, essentially, what I would like is that any character with normal site sees normal purple light, and any character with 5E's "darkvision" sees a dark/dim purplish light. This is a light source in the room that the party is entering that emanates an eerie light. The description says: "A dim light that flickers wildly can be seen coming from the chamber." I've never managed to get "flickering light" to work, either. At the moment, I'm using the free add-on: " Dynamic Lights & Spells". BTW, that add-on has an "instructions" page that says: "Player tokens with vision will be able to see any tokens put on the Map or Token & Objects layer. They will be able to see the light but not the token if placed on the Dynamic Lighting layer." That hasn't worked for me, either. My players don't see the light unless the object emanating the light is on the Token&Objects layer. Yes, the page (and the whole module/campaign) is using the Updated Dynamic Lighting. As for "night vision" and "nocturnal" - a token with night vision turned on, and the "nocturnal" setting see bright white light, not dim light in a dark room. I've tested this over and over and my players have reported that they just see normal white light.