Promptkoi

Cute 3D Alien Mascot

Stable Diffusion
By Varun Sharma Tested with Stable Diffusion SDXL 1.0

Cute 3D Alien Mascot is a tested Stable Diffusion SDXL 1.0 prompt for character design work. It runs at Stable Diffusion SDXL 1.0 · Aspect ratio 3:4 · Steps 30 · CFG scale 6 · Sampler DPM++ 2M Karras, and ships below with the exact prompt text, usage notes, and 2 pasteable variations.

Last tested: July 2026 with Stable Diffusion SDXL 1.0

Part of the Stable Diffusion prompt library · see more 3d render prompts .

Remix in builder
Small round green alien mascot with big black eyes and antennae, glossy toy finish, waving on a mint background
Cute 3D Alien Mascot — Stable Diffusion SDXL 1.0, Aspect ratio 3:4

Prompt 

A cute 3D alien mascot character, a small round pistachio-green alien with two slender antennae tipped with softly glowing bulbs, oversized glossy black eyes, a tiny closed friendly smile, stubby three-fingered hands mid friendly wave, smooth glossy vinyl-toy plastic finish with crisp specular highlights, standing full-body and centered on a plain pastel-mint background, soft three-point studio lighting, gentle rim light, Pixar-style 3D render

Negative prompt 

text, watermark, signature, extra limbs, deformed, blurry, low-poly, matte flat shading, sharp teeth, scary, wide grin, human features, realistic photo

Settings

Model
Stable Diffusion SDXL 1.0
Aspect ratio
3:4
Steps
30
CFG scale
6
Sampler
DPM++ 2M Karras

How to use this prompt

The phrase doing the work is "glossy vinyl-toy plastic finish" with "crisp specular highlights" — that sheen is what turns a flat cartoon alien into a collectible-figure render, so keep the highlight cue even if you drop everything else. SDXL drifts toward creepy the moment you say "alien," so the "oversized glossy black eyes + tiny closed smile" pairing is deliberate: round pupils and a shut mouth read cute, while any wide toothy grin trips the uncanny switch — that's why "sharp teeth" and "wide grin" sit in the negatives. Keep the backdrop a single flat pastel so the rim light can separate the figure; a busy background kills the toy-shelf look.

Variations to try

  • Seated pose — the alien sitting cross-legged cradling a tiny glowing planet, same vinyl finish, coral-pink background
  • Chrome-teal colorway — recolour to a metallic teal body with orange antennae bulbs for a retro-sci-fi toy line
3d render cute character design branding

What to do next

Adapt it →

Open this prompt in the Stable Diffusion builder, pre-filled, and change one layer at a time.

Explore more →

Browse the full Stable Diffusion prompt library — every entry tested with its settings.
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For developers — copy this prompt as JSON 
{
  "title": "Cute 3D Alien Mascot",
  "prompt": "A cute 3D alien mascot character, a small round pistachio-green alien with two slender antennae tipped with softly glowing bulbs, oversized glossy black eyes, a tiny closed friendly smile, stubby three-fingered hands mid friendly wave, smooth glossy vinyl-toy plastic finish with crisp specular highlights, standing full-body and centered on a plain pastel-mint background, soft three-point studio lighting, gentle rim light, Pixar-style 3D render",
  "negative_prompt": "text, watermark, signature, extra limbs, deformed, blurry, low-poly, matte flat shading, sharp teeth, scary, wide grin, human features, realistic photo",
  "model": "Stable Diffusion",
  "model_version": "SDXL 1.0",
  "settings": {
    "aspect_ratio": "3:4",
    "steps": 30,
    "cfg": 6,
    "sampler": "DPM++ 2M Karras"
  },
  "style_tags": [
    "3d-render",
    "cute"
  ],
  "use_case_tags": [
    "character-design",
    "branding"
  ],
  "source_url": "https://promptkoi.com/prompts/stable-diffusion/cute-3d-alien-mascot/"
}

The whole library is available as an open JSON dataset · developer docs.