After "Surrealistic Pillow", the group's music underwent a significant transformation. Key influences on the group's new direction were the popularity and success of Jimi Hendrix and the British supergroup Cream, which prompted the Airplane (like many other groups) to adopt a "heavier" sound and to place a greater emphasis on improvisation. The band's third LP, "After Bathing at Baxter's", was released on November 27, 1967, and eventually peaked in the charts at No. 17. Its famous cover, drawn by renowned artist and cartoonist Ron Cobb, depicts a Heath Robinson-inspired flying machine (constructed around an idealised version of a typical Haight-Ashbury district house) soaring above the chaos of American commercial culture.