Some assets which have a border line are displayed with irregular surface

[ryu-ton10]

Hi. thanks for giving us a very useful library.
I was just wondering that I got a assets having irregular surface as below when I tried to use Modal assets with reference the wiki code.

[Environment]

• macOS Catalina 10.15.5
• iTerm2

Does anyone have any idea about it? If you happen to know about it, please reply to me.
Thanks :)

[rivo]

This is in the FAQ. Please open another issue if the linked issues didn't help solve your problem.