Oh no, this is terrible news!
I’ve known Mark for years but I haven’t caught up with him this year. I wish I had known his health situation, then again …
A little pice of Kruzr will always stay here on this forum, and Mark’s left a good legacy for all to share.
Goodbye Mark my friend. I always knew you as a good man and a warm & sharing man.
Bless you.
Upham 
I am very very sorry.
My condolences to his family.
Bye bye Kruzr… ! … i havent other words.
very sad news. i did not know kruzr very good as i came only january, but i enyoyed reading his tuts and helpful comments when i browsed the old forum posts in my beginnings of zbrush to learn. i always smiled when i read at the end his “have a good one mark”
bye bye kruzr.
My condolences to Mark’s family.
I have no words…
Kruzr… we’ll meet again.
cameyo
He will be missed, but not forgotten. 
Alas, Eternity is not for this world
Maybe in another :qu:
Who knows !
I remember a great visual headache from Kruzr ! here
Pilou