Saw part of this last night
I saw some of Posse last night on TV. I remember way back when it came out, thinking it might be interesting, given the advertised fact that a lot of cowboys in the Old West were actually black.
Unfortunately, what I saw from this movie seemed rather weak. The dream/imagination sequences looked cheap - like they put the actors on a set with a black background and spotlight, lit some smoke, and popped a brown lense over the camera.
It seemed like after this, Mario Van Peebles kind of went away. I began to like his work way back with Sonny Spoon, but I wasn't really impressed by that movie where he plays a bald machine-solder (can't remember the name). Sometime in the 1990s (I'm guessing the late 90s) I read a short interview with him where he said that he didn't want to live life with the philosophy of "having" things, but rather "doing" - hence, I believe he had done some international travelling. It was an interesting line and I've remembered it ever since.