steampunk gothic robot Kermit The Frog construction workers building the gothic cathedral of Notre Dame in medieval gothic Paris Zdzisław Beksiński H. R. Giger hyperrealism photorealism ambient occlusion mandelbrot mandelbulb volumetric lighting 8K resolution HDR dynamic lighting Cinema 4D Mandelbulber3d LightWave 3D biopunk cassette futurism dark academia steampunk