a) Giger was packing his Alien Monster IV painting with details inspired by about a dozen difference sources and so a few things appeared to be reference Wifredo Lam's Eternal Present from 1944, which is one of the series of paintings referencing Delville's Treasures of Satan and/ or paintings that referenced Delville's painting.
|Wifredo Lam's Eternal Present (1944)|
b) The diagonal ribbing of the palm leaves transfoms into the ribbed walls of the biomechanic environment in which the winged alien monster is to be found.
|HR Giger's Alien Monster IV (1978)|
c) The thumb of the hand holding the knife along with the curve of the blade transform into the beaked had with an eye, and the high healed shoe with a divided heal transforms into the joint leg bone like form beside it.