50 Watts has a gallery of Philippe Caza’s early work. Caza writes, “I was a great fan of Moscoso, Crumb, Griffin, and some other US underground comix that I could find at one bookseller in Paris.”
I think his work is also reminiscent of Heinz Edelmann, the Yellow Submarine artist, and Peter Max.
Caza posts his recent (and excellent) work on his blog (which is in French).