Lem hated Tarkovski's "Solaris". Strugatski brothers hated his "Stalker" based on their "The Roadside Picnic". Tarkovski was always making his own movies base

Lem hated Tarkovski's "Solaris". Strugatski brothers hated his "Stalker" based on their "The Roadside Picnic". Tarkovski was always making his own movies based on his own (understanding of) stories. Basing them on other people's work was just a pretext :)