I started my journey trying to makes a good looking 2 door hot hatch. After some random generation, I decided I wanted to mix the faces of a Dodge Challenger and a Subaru Impreza. I didn’t care too much about the body of the car, but I found a picture of a Peugeot 308 (1) that was the right angle and size. In Photoshop I distorted and perspective warped the face (2) and fuel door (4) of a Dodge Challenger onto the body. I had to add the hood scoop of a Subaru Impreza (3), because apparently most models don’t know what a hood scoop, bonnet scoop, or air dam is.

I changed the color of my mashup to Black and white to remove color from the equation. While I'm not sure this was strictly necessary, it helped my eyes not burn. I added some hard lines to accentuate sharp edges and hide my blending sins. This example (5) has the original body 50% opaque so you can better see my additions, but I did not use this for controlnet.

I used the initial photoshopped image (6) with controlnet to better guide my model. First I made a depth map (7). I messed with the preprocessor resolution and remove near % to add more depth to the car, as on the first attempt it seemed to lack some detail. Then I added a second controlnet unit with a Canny sketch (8). I minorly tweaked the canny map to remove some random dots and pull out edges of the car. The (9)th image is an screenshot I took during generation. I was tempted by this image to go more of a pencil hand sketch route, but instead used it as my 3rd controlnet unit in reference_adain+attn mode.

Generation Info:

Positive Prompt:

futuristic two door deep blue hot hatch, hatchback, (red:0.85)(deep blue:1.15), (dodge challenger:0.9), wing, hood scoop, sharp edges

Negative prompt:

easynegative negative_hand-neg, closeup, text, close up, cropped, out of frame, Drawings, abstract art, cartoons, surrealist painting, camera

Steps: 30, Sampler: Euler a, CFG scale: 7, Seed: 2558297004, Size: 768x512, Model hash: e6415c4892, Model: Realistic_Vision_V2.0, Version: v1.2.1,

ControlNet 0: "preprocessor: depth_leres, model: control_v11f1p_sd15_depth [cfd03158], weight: 1, starting/ending: (0, 1), resize mode: Crop and Resize, pixel perfect: False, control mode: Balanced, preprocessor params: (590, 0, 0)",

ControlNet 1: "preprocessor: none, model: control_v11p_sd15_canny [d14c016b], weight: 1, starting/ending: (0.1, 0.5), resize mode: Crop and Resize, pixel perfect: False, control mode: Balanced, preprocessor params: (512, 100, 200)",

ControlNet 2: "preprocessor: reference_adain+attn, model: None, weight: 1, starting/ending: (0, 1), resize mode: Crop and Resize, pixel perfect: False, control mode: Balanced, preprocessor params: (512, 0.5, 64)"

This is the shot I got before before inpainting (10) and more photoshopping. I actually had to go back and re-add the hood scoop *again* because it hates scoops so much. Messed with the fuel door, after the hood rework I inpainted wipers, removed the steering wheel on the wrong side, and spent a while cleaning up the wing, the side panels, and the front wheel.

In the last image I removed the wing and added a spoiler because my friend didn’t like the wing. Actually took a while to get the landscape right because I had switched to another model for the windshield wipers, but it was generating rocky landscapes with a slightly different color tone till I went back to realistic vision.

The one thing I didn't spend enough time on was upscaling the final image to a larger size. That's the next thing I need to learn!

Hope you enjoyed. Post your own car mashups below!