Prompt Tripo for image-to-3D

Last updated: October 12, 2026

Tripo turns an approved character or prop render into a textured mesh, with the back and sides filled in from a single front view. Pick it when the design is settled and you need it in 3D: a high-detail mesh on Tripo v3.1, or a low-poly, quad-based one on Tripo P2.

Let the agent write it

You don't have to set any of this up yourself. The Layer agent knows how each 3D model reads its source, from the same guidance this page is built on. Attach the render in chat, name the model and say what the mesh is for, for example: Turn this into a 3D model with Tripo P2: a low-poly quad mesh under 5,000 faces with PBR materials, for a mobile game. If there is no clean render yet, ask the agent to make one first; it writes the image prompt for a front view on a plain background, shows you its plan, and runs it when you approve. Use the rest of this guide when you want to prepare the image and settings yourself, and see Write a brief for the agent for how to brief it.

When to use it

Use Tripo when you have the image and need the mesh: characters, creatures, weapons and props for a game, in-engine previews of concept art, and quick blockouts that hold the approved design. It is strongest with one clear subject on a plain background.

It is not for whole scenes: it builds one object, and drops the background. To start from a description with no image at all, open Create mesh from the side panel and write a prompt instead.

Versions on Layer

Tripo v3.1

The high-detail model, and the one this guide's film uses. Dense, closely matched geometry and textures, Ultra detail for finer surface detail, Generate parts to split the mesh, and up to four Source images, one per view (front, left, back, right).

Tripo P2

The game-ready, low-poly model. A Face limit from 48 to 50,000, Quads up to 25,000 faces, and one Source image. Use it when the polygon budget matters more than surface detail. A quad mesh arrives as an FBX file.

How to write the prompt

With a source image, you don't write one. Tripo builds the mesh from the image alone: its image-to-3D request has no prompt, so anything in the prompt box, the negative prompt and the Pose setting do not reach the model. The image is the brief, so the work goes into the image:

One subject, whole and uncropped
+ front view (or three-quarter), looking at the camera
+ plain flat background
+ soft, even light with no hard cast shadows
+ for a character you will rig: a relaxed A-pose, arms clear of the body

When you make the source on Layer, put those words in the image prompt. This is the one we used for the dwarf in the clip above:

Full-body front view of a stylised fantasy game character: a stocky dwarf blacksmith with a braided red beard, leather apron over a brown tunic, iron bracers, heavy boots, a short forging hammer held in his right hand at his side. Standing straight in a relaxed A-pose, arms angled slightly away from the body, feet apart, looking straight at the camera. Centred, whole body in frame with margin around it. Plain flat light grey background, soft even studio lighting, no cast shadows, no props on the ground. Stylised hand-painted 3D game character render, clean readable shapes.

What works

A clean front render

One front view on a plain background is enough for a usable character. We ran that render on Tripo v3.1 and on Tripo P2. v3.1 returned one textured mesh that matches the render closely, down to the beard braids, the buckle and the rivets, with a believable back the image never showed. P2, held to 5,000 faces with quads, kept the same silhouette and design with flatter detail.

Even light in the source

The lighting in the image is painted into the mesh's colours. We gave Tripo v3.1 the same dwarf as dramatic key art: a dark forge, hard orange light from one side, a low three-quarter angle. It handled the shape well, dropped the forge and stood him upright, but the mesh came out dark and muddy, with the brass buckle and beard rings losing their colour. The plain, evenly lit render gave clean colours that relight properly in an engine. Tripo also warns that hard shadows can be read as shape and turn into dents.

One whole subject

Keep the subject whole, in frame with a margin around it, and clear of anything that hides part of it. Crop a busy image down to the subject before you use it.

A rig-ready pose

For a character you will rig or animate, make the source in a relaxed A-pose with the arms away from the body. The Pose setting only shapes meshes made from a prompt, so with a source image the pose has to be in the image.

More views on Tripo v3.1

A single image leaves the back and sides to the model's judgement. On Tripo v3.1, add more Source images of the same subject, each in the view it shows. The front view is required, and every view should share the same lighting.

Resolution

Use an image at least 256 px on its short side; a larger, sharp image carries more detail into the mesh.

What to avoid

Writing a prompt for an image-to-3D run

Words in the prompt box don't change a mesh made from an image. If the mesh needs a different material, colour or pose, change the image and run it again, or texture the finished mesh afresh with a retexture tool.

Dramatic key art as the source

Dark scenes, coloured light and deep shadows end up in the texture. Make a plain, evenly lit render of the subject from the key art first, approve it, then turn that into the mesh.

Parts with textures

Tripo cannot split a mesh into parts and texture it in the same run. With Generate parts on, the parts come back as bare geometry to texture afterwards.

Low poly on a complex subject

Low poly on Tripo v3.1 gives clean, hand-made-style topology on simple subjects and can fail on complex ones. For a detailed character on a tight budget, use Tripo P2 with a Face limit instead.

A face limit set too low

On Tripo P2, quality drops below about 150 faces for a simple object and 250 for a complex one. Treat Face limit as a ceiling, not an exact count: our 5,000-face P2 run came back as 6,160 faces, mostly quads.

Settings that matter

Source images (Tripo v3.1) or Source image (Tripo P2) hold the render the mesh is built from. Face limit caps the polygon count: 10,000 to 50,000 faces suits web and mobile, more for a hero asset on Tripo v3.1. Generate textures paints colour onto the mesh; turn it off for bare geometry. PBR materials adds metalness, roughness and normal maps, so turn it on for anything going into a lit engine scene. On Tripo v3.1, Ultra detail sculpts finer surface detail and takes longer, Low poly gives a simpler mesh, and Generate parts splits it into editable pieces. On Tripo P2, Quads builds the mesh from four-sided faces, which are easier to edit and rig.

Prompts to start from

Source render for a character mesh

Full-body front view of a stylised fantasy game character: a stocky dwarf blacksmith with a braided red beard, leather apron over a brown tunic, iron bracers, heavy boots, a short forging hammer held in his right hand at his side. Standing straight in a relaxed A-pose, arms angled slightly away from the body, feet apart, looking straight at the camera. Centred, whole body in frame with margin around it. Plain flat light grey background, soft even studio lighting, no cast shadows, no props on the ground. Stylised hand-painted 3D game character render, clean readable shapes.

Run it with an image model, approve the render, then turn it into a 3D model.

High-detail character mesh

Tripo v3.1, no prompt, Face limit 30,000, Generate textures and PBR materials on. This is the run in the clip above.

Low-poly quad mesh for a game

Tripo P2, no prompt, Face limit 5,000, Quads, Generate textures and PBR materials on.

Use it in Layer

  1. Add the approved render to a session's board.

  2. Click View on the image, then Turn into 3D model. Create mesh opens in the side panel with the image as its source.

  3. Click the model name at the top of the panel and choose Tripo v3.1, or Tripo P2 for a low-poly mesh. The source image stays in place.

  4. Leave the prompt empty: Tripo builds the mesh from the image alone.

  5. Turn on PBR materials, and set Face limit to your polygon budget.

  6. Click Create 3D model. The cost shows on the button before you click.

  7. When the mesh lands on the board, click View to open it in the viewer and turn it around. If the colours or shape are off, fix the source image and run it again.

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