It actually does use some native controls on Windows and macOS. On Linux and UNIX it is meant to look like Motif, which was the most popular toolkit on those p

It actually does use some native controls on Windows and macOS. On Linux and UNIX it is meant to look like Motif, which was the most popular toolkit on those platforms at the time. There’s also the themed Ttk package which has some themes that look more modern… https://wiki.tcl-lang.org/page/Ttk https://wiki.tcl-lang.org/page/Ttk