Tried my hand at cars. I used the Juggernaut model. The prompt uses regional prompter extension and looks like this:

at night city, summer, sweaty ADDCOMM
RAW photo, Nikon Z6 II Mirrorless Camera, hyper realism, extremely detailed, 8k uhd, dslr, soft lighting, high quality, film grain ADDBASE
ADDROW
ADDCOL
Aston Martin zeekars, hotrod, LED, lora:zeekars:.7 ADDROW
Negative prompt: JuggernautNegative-neg, transition of shapes, blurry, (((numbers on door))), duplicates, close range angle, crop, illustration, drawing, painting, sketching, render, artwork, 3d, cgi, logo, text, letterbox, 3D, render, video game, anime, cartoon, sketch, caption, subtitle, signature, watermark, username, artist name

I use SD upscale and ControlNet Tile for upscaling with 4x_NMKD-Siax_200k. zeekars is a Lora.

I hope SDXL will improve in all the small details for mechanical, geometrical forms. At first, the image looks great but when you look closely, panels separation, headlight, tyres look unrealistic...We will see tomorrow!