Improved version: Synth Species '24.
Check out the Furry Diffusion server: https://discord.gg/furrydiffusion
Get Gay621 here: https://civitai.com/models/10319/gay621-solo-male-focus
Base model is very NSFW but this LoRA can do both SFW & NSFW.
WARNING: sketch tag is heavily correlated with vore-looking bellies, put vore and big belly in the negative prompt to avoid it.
synthbod - for full body pictures.
synthhead - for bust and headshot portraits.
synthspecies - general trigger word.
explicit, questionable and safe - based on the e621 ratings.
LoRA is using e621 tags, I didn't prune many so you can experiment with any common Synth-related tag. Weight 1.0 works OK.
I tend to use bizarre prompts so you'll probably be better off using your regular prompts or starting with generic Gay621 prompts, but here's an example anyway:
male, anthro, solo, synthspecies, high resolution, detailed, 3 fingers, 2 toes, digitigrade, tail, ((watercolor painting)), bust portrait, close-up, head, synthhead, ((muscular, very tall), fantastic weather), looking at viewer, split pupils, Brandeis blue, white
Negative prompt: deformed head, ugly, wings, low resolution, low quality, clutter, cropped, deformed face, deformed, mutated, fleshpile, terrible, bad anatomy, missing limbs, amputee, disfigured, female, breasts, boobs, girl, obese, gynomorph, deformed, blurry, multi limb, taur, multiple limbs, bad anatomy, disfigured, poorly drawn face, mutated, extra limb, ugly, multiple characters, feral, deformed hands, face out of frame, multiple tails, multiple characters, chastity, cage, chastity cage, ((fur, furry, fluffy, hair)), penis, balls
Steps: 40, Sampler: Euler a, CFG scale: 5, Seed: 2113812715, Size: 512x640, Model hash: f09fc7bd86, Model: gay621_alpha, AddNet Enabled: True, AddNet Module 1: LoRA, AddNet Model 1: synth-gay621_alpha-02_20(8185c97ef7f1), AddNet Weight A 1: 0.9