Draw lines on tile

Phaser 3
1

Hello,
I’m making sokoban game, which tile based game.
I’d like to draw vertical and horizontal lines on tilemap to make more clear where the user is.
When I tried to draw lines using scene.add.graphics, it made my game super slow.

I was thinking to draw the line on image file, but it would draw the line with 2 px of border.
Can you give me advice?

Thanks,

2

Could we see the problem code? (Also, don’t forget to format it with the </> button!)