Is there a way to make an invisible wall that players can see through?

Im working on lighting for a Jail Map and I was wondering if there was a way for players to be able to see through the bars of the cell without having them just walk out

Not without access to the API, a Pro Subscriber Perk.  With the API, you can craft walls that use a different instruction which is transparent but blocks movement.  I have a script for that called UDLWindows . At Plus and lower subscription levels, there isn't a way of doing this.  The User Interface doesn't expose this functionality at all.

API Windows are also possible with Door Knocker, available through One Click. As simple as drawing them in a designated color.

Two thoughts off the top of my head: 1. You can make tiny, closely-spaced dynamic lighting barriers for the bars and try to trap the token that way. You get a bit of vision restriction that way but it's not total. 2. You can make a full dynamic lighting barrier for each cell, turn off Dynamic Lighting for the jail page, and turn on "Dynamic Lighting Barriers Restrict Movement" on the Page Details tab. This is compatible with regular Fog of War. (Edit: 3. Or do what keithcurtis said.) :)

For an example of 1) above, and some tips on how to do it without going insane, check out:&nbsp;<a href="https://app.roll20.net/forum/permalink/3304442/" rel="nofollow">https://app.roll20.net/forum/permalink/3304442/</a>

To expand on Sarah's option 1, you can make a full size row of X's where each X fills a grid square.&nbsp; You make one of these X's every other grid square (or every third) for however long you need.&nbsp; Then you can group select the entire thing and shrink it down for your bars.&nbsp;