Conversation so far:
What was going on with the group?
After a four-year hiatus, rumours of mental illness began to spread which turned out to be nothing more than exaggeration of Cobain's mercury poisoning from fillings in his teeth.
When did they make more music?
The pair returned in 2002 with "The Isness".
How did the music sound?
heavily influenced by 1960s and 1970s psychedelia.
Did the album get rave reviews?
The album received mixed press due to the drastic change in sound.

Question: What was different about their sound?
Self-contained rewrite: What was different about The Isness sound?