Something seems to have changed with how UDL is working for complex paths (where the drawing "pen" is lifted and another line is drawn). A user of my DLDarkness script alerted me to this new behavior. In the script, a single path object is created via the api, comprised of a continuous "circle" (approximated by many line segments), followed by a series of vert/horiz lines forming a grid that are "disconnected" from the circle (i.e. the pen is lifted before drawing each line). An example path json is included at the bottom of this post. This used to work fine for both LDL/UDL, but now UDL only seems to be recognizing the first "continuous" path segment (the "circle") and ignoring the rest. View from outside: View from inside (Note: this was using a dummy player account, to ensure no shenanigans with UDL and Ctrl-L problems).  The interior grid is ignored - the token can see everything within the circle that should be blocked by existing grid lines on the DL layer. If separate (simple, continuous) path objects are used for the grid, the lines block sight as normal. However, the script allows movement tracking of the DL path with an associated token and it would really be a pain to have to break this up into a bajillion separate paths. Hopefully this gets fixed! Example complex darkness path JSON follows. The line segments forming the grid start at about 80% of the way to the end of the path string. e.g. additional "M"s denoting "picking up the pen".  [["M",250,125],["L",249.614666716641,134.8073869659806],["L",248.46104257439222,144.55430813002886],["L",246.54624004970958,154.18067048198816],["L",243.88206453689418,163.62712429686843],["L",240.48494156391084,172.83542904563623],["L",236.37581552354598,181.74881246744334],["L",231.58002054426152,190.3123205894936],["L",226.12712429686843,198.47315653655915],["L",220.05074570000386,206.18100604127295],["L",213.38834764831844,213.38834764831842],["L",206.18100604127295,220.05074570000386],["L",198.47315653655915,226.12712429686843],["L",190.3123205894936,231.58002054426152],["L",181.74881246744337,236.37581552354595],["L",172.83542904563623,240.48494156391084],["L",163.62712429686843,243.88206453689418],["L",154.1806704819882,246.54624004970958],["L",144.55430813002886,248.46104257439222],["L",134.8073869659806,249.614666716641],["L",125.00000000000001,250],["L",115.19261303401937,249.614666716641],["L",105.44569186997114,248.46104257439222],["L",95.81932951801181,246.54624004970958],["L",86.37287570313157,243.88206453689418],["L",77.16457095436377,240.48494156391084],["L",68.25118753255664,236.37581552354595],["L",59.68767941050639,231.58002054426152],["L",51.526843463440855,226.12712429686843],["L",43.81899395872705,220.05074570000386],["L",36.611652351681556,213.38834764831842],["L",29.949254299996127,206.18100604127295],["L",23.87287570313157,198.47315653655915],["L",18.41997945573847,190.3123205894936],["L",13.624184476454019,181.74881246744334],["L",9.515058436089163,172.83542904563623],["L",6.117935463105809,163.62712429686843],["L",3.453759950290433,154.18067048198816],["L",1.5389574256077765,144.55430813002886],["L",0.3853332833590031,134.8073869659806],["L",0,125],["L",0.3853332833590031,115.19261303401939],["L",1.5389574256077765,105.44569186997114],["L",3.453759950290433,95.81932951801183],["L",6.117935463105809,86.37287570313157],["L",9.515058436089163,77.16457095436377],["L",13.624184476454019,68.25118753255666],["L",18.41997945573847,59.687679410506405],["L",23.87287570313157,51.526843463440855],["L",29.949254299996127,43.81899395872705],["L",36.611652351681556,36.61165235168157],["L",43.81899395872705,29.949254299996127],["L",51.526843463440855,23.87287570313157],["L",59.68767941050639,18.419979455738485],["L",68.25118753255664,13.624184476454033],["L",77.16457095436377,9.515058436089163],["L",86.37287570313157,6.117935463105809],["L",95.81932951801181,3.453759950290433],["L",105.44569186997114,1.5389574256077765],["L",115.19261303401937,0.3853332833590031],["L",124.99999999999999,0],["L",134.8073869659806,0.3853332833590031],["L",144.55430813002886,1.5389574256077765],["L",154.1806704819882,3.453759950290433],["L",163.62712429686843,6.117935463105809],["L",172.83542904563623,9.515058436089163],["L",181.74881246744337,13.624184476454033],["L",190.3123205894936,18.419979455738485],["L",198.47315653655915,23.87287570313157],["L",206.18100604127295,29.949254299996127],["L",213.38834764831844,36.61165235168157],["L",220.05074570000386,43.81899395872705],["L",226.12712429686843,51.526843463440855],["L",231.58002054426152,59.687679410506405],["L",236.37581552354598,68.25118753255666],["L",240.48494156391084,77.16457095436377],["L",243.88206453689418,86.37287570313157],["L",246.54624004970958,95.81932951801183],["L",248.46104257439222,105.44569186997114],["L",249.614666716641,115.19261303401939],["L",250,125],["M",70,237.24972160321823],["L",70,12.750278396781752],["M",147.27105745132008,2],["L",102.72894254867991,2],["M",238.20777358467925,72],["L",11.792226415320755,72],["M",248.83860464330178,142],["L",1.161395356698236,142],["M",214.7552226892675,212],["L",35.2447773107325,212],["M",140,249.09673645990858],["L",140,0.9032635400914302],["M",147.27105745132008,2],["L",102.72894254867991,2],["M",238.20777358467925,72],["L",11.792226415320755,72],["M",248.83860464330178,142],["L",1.161395356698236,142],["M",214.7552226892675,212],["L",35.2447773107325,212],["M",210,216.6515138991168],["L",210,33.34848610088321],["M",147.27105745132008,2],["L",102.72894254867991,2],["M",238.20777358467925,72],["L",11.792226415320755,72],["M",248.83860464330178,142],["L",1.161395356698236,142],["M",214.7552226892675,212],["L",35.2447773107325,212]]