parameters

(solo, anthro, 1boy), furry, male, shower, low view, from below, leaning on wall, BREAK,
anthro, fox, nick wilde, zootopia, disney, adult, canine cock, hand on penis, sheath, knot, mouth open, looking at penis, erection, pleasured, BREAK,
masterpiece, best quality, amazing quality, very aesthetic, high resolution, absurdres, newest, scenery, ultra-detailed, detailed eyes, detailed fur, dynamic lighting, 8k, HDR, ultra-HD, highly detailed, 8k, HDR, realism, realistic, <lora:StS-Illustrious-Detail-Slider-v1.0:3>,
Negative prompt: human, (worst quality, bad quality:1.2), lowres, low quality, bad quality, bad male anatomy, bad female anatomy, grainy, noisy, render, filmgrain, text, deformed, disfigured, human penis, (female), (breasts), abs, extra fingers, bad anatomy, extra fingers, white background, black background, signature, patreon, web address, humanoid penis, text, feral, blurry, faded, antique, muted colors, greyscale, boring colors, flat, bad photo, terrible 3D render, black and white, glitch, cross-eyed, lazy eye, ugly, distorted, glitched, lifeless, bad proportions, watermark, window, human penis, vagina, looking at viewer,
Steps: 40, Sampler: Euler a, Schedule type: Karras, CFG scale: 5, Seed: 3239236256, Size: 696x904, Model hash: 5901b6dd1e, Model: novaFurryXL_illustriousV50, Lora hashes: "StS-Illustrious-Detail-Slider-v1.0: 2e7a68ec7e2e", freeu_enabled: True, freeu_b1: 1.01, freeu_b2: 1.02, freeu_s1: 0.99, freeu_s2: 0.95, freeu_start: 0, freeu_end: 1, Version: f2.0.1v1.10.1-previous-659-gc055f2d4

Then img2img: 

parameters

(solo, anthro, 1boy), furry, male, shower, low view, from below, leaning on wall, BREAK,
anthro, fox, nick wilde, zootopia, disney, adult, canine cock, hand on penis, sheath, knot, mouth open, looking at penis, erection, pleasured, BREAK,
masterpiece, best quality, amazing quality, very aesthetic, high resolution, absurdres, newest, scenery, ultra-detailed, detailed eyes, detailed fur, dynamic lighting, 8k, HDR, ultra-HD, highly detailed, 8k, HDR, realism, realistic, <lora:StS-Illustrious-Detail-Slider-v1.0:3>,
Negative prompt: human, (worst quality, bad quality:1.2), lowres, low quality, bad quality, bad male anatomy, bad female anatomy, grainy, noisy, render, filmgrain, text, deformed, disfigured, human penis, (female), (breasts), abs, extra fingers, bad anatomy, extra fingers, white background, black background, signature, patreon, web address, humanoid penis, text, feral, blurry, faded, antique, muted colors, greyscale, boring colors, flat, bad photo, terrible 3D render, black and white, glitch, cross-eyed, lazy eye, ugly, distorted, glitched, lifeless, bad proportions, watermark, window, human penis, vagina, looking at viewer,
Steps: 40, Sampler: DPM++ 3M SDE, Schedule type: Karras, CFG scale: 5, Seed: 3239236256, Size: 1776x2312, Model hash: 5901b6dd1e, Model: novaFurryXL_illustriousV50, Denoising strength: 0.45, Lora hashes: "StS-Illustrious-Detail-Slider-v1.0: 2e7a68ec7e2e", freeu_enabled: True, freeu_b1: 1.01, freeu_b2: 1.02, freeu_s1: 0.99, freeu_s2: 0.95, freeu_start: 0, freeu_end: 1, Version: f2.0.1v1.10.1-previous-659-gc055f2d4

Edited (clipped, changed some coloring, fixed/changed eyes, nose, etc) using: 
Software: Paint.NET 5.1.7

While editing, ran inpainting using the prompts above and these settings: 

Steps: 40, Sampler: DPM++ 3M SDE, Schedule type: Karras, CFG scale: (somewhere between 4-5 depending on the need), Model hash: 5901b6dd1e, Model: novaFurryXL_illustriousV50, Denoising strength: 0.5, Mask blur: 4, Lora hashes: "StS-Illustrious-Detail-Slider-v1.0: 2e7a68ec7e2e", freeu_enabled: True, freeu_b1: 1.01, freeu_b2: 1.02, freeu_s1: 0.99, freeu_s2: 0.95, freeu_start: 0, freeu_end: 1, Version: f2.0.1v1.10.1-previous-659-gc055f2d4

Then upscaled: 

postprocessing

Postprocess upscale by: 1.2, Postprocess upscaler: R-ESRGAN 4x+ Anime6B