How to make a Roblox pet with AI (step by step)

A few years ago a single simulator pet meant a concept artist, a 3D modeler, a rigger and an animator. Today you can get a textured, rigged and animated pet in one sitting with AI. The tools are good enough that the bottleneck has moved: what decides whether the pet works in your game is no longer the modeling, it is the brief you give the AI and the Roblox-specific cleanup afterwards.

This guide walks through the whole pipeline we use, from idea to a pet standing in Roblox Studio. It works with any AI 3D tool, and we point out where Proppo handles a step for you.

What do you need to make a Roblox pet with AI?

An idea for the pet's role in your game, Roblox Studio (free) to import and test it, and an AI 3D generator that exports FBX or GLB. Blender is optional if your tool already handles the budget, scale, rig and variants.

• An idea with a job. Is this a starter pet everyone gets, or the mythic chase pet at the bottom of an egg? The answer changes how flashy it should be.
• Roblox Studio, free from Roblox, to import and test the pet.
• An AI 3D generator. We use Proppo below. Any tool that exports FBX or GLB works for the generation step, but you will then do the rig, the budget and the variants yourself (in Blender, for example).

Step 1: Pick a concept and write the prompt

AI 3D models copy what they are shown, so the brief is where most of the quality comes from. A good pet prompt describes one creature, its silhouette (big wings, round body, long tail), its colors and materials, and a neutral pose: standing, wings open, mouth closed. Leave out scenery, other characters and floating effects. They turn into extra geometry glued to your pet.

Here is the kind of prompt that works:

If you can draw, a clean sketch or painting is even better than text. Use a single character on a plain background, seen from the front or a three-quarter angle, with no text or watermark.

Step 2: Generate the 3D model

There are two ways in. Text to 3D is the quickest. Image to 3D gives you more control, because you can look at the picture and fix it before you spend credits on 3D. In our tests, making a concept image from the prompt and then converting that image gave cleaner pets than going straight from text, so that is the route we recommend.

In Proppo a concept picture costs 3 credits and a textured image-to-3D model 20 credits. If you have side and back views of the same design, multi-view to 3D (20 credits) uses them to guess less about the parts the front view hides. Generations that fail are refunded.

Step 3: Check the triangle and texture budget

Roblox accepts up to 20,000 triangles per mesh (modeling specifications), but a pet game can show dozens of pets at once, so pets should be far lighter than that. Our defaults, picked for phones, are:

The Roblox export in Proppo reduces the mesh to the budget, caps the texture, scales the pet to studs and puts the pivot at the bottom center, so it sits on the ground when you import it. If you work in another tool, do these four things yourself before export. Our guide to triangle and texture limits explains the numbers.

Step 4: Auto-rig it with an idle and a walk loop

A static pet is fine for many simulators: game scripts bob and tilt it as it follows the player. A rig makes it come alive instead. The body bends when it walks, the tail swings, the wings flap. Rigging by hand takes hours in Blender. An auto-rig finds the spine, legs, tail, fins or wings for you.

Proppo's rig (10 credits) builds the skeleton from a body template and adds two looping clips, an Idle and a move loop, each 2 seconds at 30 fps:

Step 5: Make the rarity set

Pet games sell the same creature in rarer looks. The cheap, consistent way to do that is to keep one mesh and one rig and swap only the texture. Proppo makes a full set (Gold, Diamond, Shadow, Rainbow and Neon) for 5 credits. Every variant keeps the same mesh and rig, so your hatch animation can swap them instantly. How to spread those tiers across an egg is a design question of its own, covered in how to design egg rarity tables.

Step 6: Export and import into Roblox Studio

Export as FBX with the textures next to it. FBX keeps the rig and the animation. In Studio, open the 3D Importer with File > Import (Ctrl+M / Cmd+M), pick the file, leave the scale unit on Studs and import. A rigged pet comes in with its bones under the MeshPart and an AnimationController on the model. The clips in the FBX are saved to an AnimSaves folder; open them in the Animation Editor and publish them with ⋯ > Publish to Roblox.

Every setting, plus fixes for missing textures, is in our step-by-step Roblox Studio import guide.

How much does it cost to make a Roblox pet with AI?

Roblox Studio's own Assistant generates static meshes for free. On Proppo, a textured, rigged pet with a rarity set is 38 credits.

With Proppo, the full run in this guide (concept image, textured model, rig and one rarity set) is 38 credits. The Roblox export itself is free. You get 60 free credits when you confirm your email, enough for one complete pet, plus 20 more every 30 days on the Free plan.

Models made on the Free plan are public under CC BY 4.0. See pricing for the current plans.