Generate an ultra-sharp, glossy, cinematic 4:5 aspect ratio poster for a professional automotive design featuring the BMW 750iL (E38) in a deep metallic-black or obsidian grey paint.

Composition:
* Background Panels: Three vertical rectangular panels showcasing different detail angles of the E38:
* Close-up of the V12 (M73) engine block.
* Rear-view highlighting classic E38 taillights and the long-wheelbase trunk line.
* Interior dashboa . . .