@Loulimi, wait you say correctly?
And it works on Linux! (So do the VHLT, so they seem to be very slow on Linux)
You believe it is slow? For me It is really faster. My computer was released since December 2016 It is close to 3y years now. But it is very fast.
Why do I believe that VHLT is slow on Linux. Did you try Linux Mind or Ubuntu? Can I see how did you get problem with vhlt.
Half-Life Texture Tools seem to have a problem adding textures to an already existing wad.
Wow you did it. Like also in J.A.C.K. or in VHL has missing wad file, too!
I don't know if SoloKiller, PenguinBoy or me work hard own C# written alternative to J.A.C.K. or VHE.
You can see my journal I made XLibSharp for Linux only. ( But I don't care common types with enumerations by Steffen Ploetz ) I port XLib in C# with real default types like int, short, byte, IntPtr or whatever...
But I try to resolve any problems with XLib functions. I hope I can because I see many Linux and Mac users wait longer for GUI of C# for Half-Life (Cross)-Mapping
PS: Who uses Mac than somebody can use Xamarin.Mac for C#.