[Even though "c-script" is mostly wdl in this forum]
I know I already asked by e-mail some time ago, but why are you using A7/A6? Doesn't that just limit you?
Even though the file extension still says *.wdl, you don't write the code in WDL, but in C-Script. The World Definition Language is very old, I think it was last used in A4.
"Falls das Resultat nicht einfach nur dermassen gut aussieht, sollten Sie nochmal von vorn anfangen..." - Manual
