What really makes something "Gigerian" ?

What really makes something “Gigerian”?

Is it simply the biomechanical aesthetic bones, metal, tubes, skulls and organic machinery or is there something deeper to H.R. Giger’s work?

If you removed the most recognizable visual elements, would you still be able to recognize his influence?

Is Giger’s legacy really about a visual style, or did he create an entire visual language based on sexuality, death, the human body, machinery, architecture and the subconscious?