when using point light in my scene, it shows weird scribbly lines

[emir_ulusoy_49]

im trying to simply use a simple point light, and when i increase the light to 1.5 or higher, it shows these scribbly lines

whenever i run the game and run, the scribble moves aswell as if there is multiple vertex on the walls (which there isnt) i have tried using direction light which is working fine but its something i dont want, but spot, point and area lights is not working

[emir_ulusoy_49]

hmm, so i found out that when designing map, you have to be preicse with the design, like you have to connect the walls exactly on the edge, thats why these lines are showing, question is, is there a way (faster way) to design maps when it comes to edges of the assets?