Just keep in mind it is a period piece.

Devils Rejects was filmed following the 70s style of filmwork in horror. The film was supposed to be made fully with only effects available in the 70s as they would have at that time but they ran into time constraints and had to use some digital to finish it off in time.

House was shot in a 60's style but had elements of 70s as well. The psychedelia was a disorienting thing they used to use in horror and sci fi flicks from the late 50s through the 60s. You will see it in some pop films of the time as well when suspense is to be interjected because of lack of technology for anything else really.