Prompting best practices

Write prompts that produce better 3D models, using a four-part formula, tips for each goal, and examples of good and bad prompts.

Prompt structure formula

An effective prompt combines four parts:

[Subject] + [Material/Texture] + [Art Style] + [Technical Constraints]

For example, this prompt uses all four parts:

A medieval knight's helmet with scratched iron surface in dark fantasy art style, low-poly, game-ready asset

The prompt breaks down into these parts:

  • Subject: "A medieval knight's helmet"

  • Material: "with scratched iron surface"

  • Style: "in dark fantasy art style"

  • Technical constraints: "low-poly, game-ready asset"

A longer prompt isn't always better. Put the most important details first, because the first words carry the most weight. A Text to 3D prompt can be up to 800 characters.

Prompt tips by goal

Different goals need different prompts.

For realistic models:

  • Describe real materials, for example "brushed stainless steel" or "oak wood with visible grain".

  • Add detail in layers: the main body first, then surface details, then wear and aging.

  • Avoid descriptions that contradict each other.

For stylized or cartoon models:

  • Name the style, for example "Pixar style", "Studio Ghibli", or "flat shading cel-shaded".

  • Describe the shape language, for example "round", "exaggerated proportions", or "chibi".

For game assets:

  • Select Smart Topology as the model type, and add "game-ready" to the prompt.

  • Avoid long descriptions of fine detail.

  • Include "clean edges" and "minimal geometry".

For 3D printing:

  • Ask for a sturdy structure with words such as "solid", "watertight", and "no floating parts".

  • Avoid very thin features.

  • Specify "printable proportions".

For 3D Agent conversations:

  • Write as you would in a conversation. The agent uses your earlier messages as context.

  • Start broad ("I want to create cyberpunk props for a game"), and let the agent help you refine the idea.

  • Ask for several concepts at once, for example "Show me 6 variations of this idea".

  • Refer to earlier concepts, for example "I like the third one. Can we make it more detailed?"

Prompt dos and don'ts

The following table pairs prompts that work with prompts that don't.

DoDon't
"a wooden treasure chest with iron bands""a box" (too vague)
"front-facing, centered, white background""stunning beautiful epic" (empty adjectives)
"low-poly cartoon style, 5,000 faces""make it look good" (not actionable)
"weathered stone surface with moss""stone and wood and metal and glass" (too many materials)

Negative prompts

To exclude unwanted elements, add a negative phrase to the prompt. For example:

  • "no background elements"

  • "without floating particles"

  • "no text or labels"

Good and bad examples

A specific prompt names the subject, materials, style, and technical constraints:

  • Good: "A sci-fi plasma rifle with glowing blue energy core, carbon fiber body with chrome accents, cyberpunk style, game-ready low-poly asset"

  • Bad: "cool gun"

A prompt for 3D printing also gives structural guidance:

  • Good: "A chess rook piece, medieval castle tower design, solid structure, no thin overhangs, 8 cm tall, printable without supports"

  • Bad: "chess piece", which gives no structural guidance for printing

FAQ

How do I write a good 3D generation prompt?
Use the formula Subject + Material/Texture + Art Style + Technical Constraints, and put the most important details first.
Do longer prompts produce better 3D models?
Not necessarily. Clarity and key details placed first matter more than length, because the first words carry the most weight.
How do I prompt for low-poly game assets?
Select Smart Topology as the model type, include "low-poly" or "game-ready" in the prompt, add "clean edges" and "minimal geometry," and avoid heavy detail.
How do I prompt for 3D-printable models?
Emphasize "solid," "watertight," and "no thin overhangs," avoid very thin features, and specify printable proportions.
Can I use negative prompts in Meshy?
Yes. Exclude unwanted elements with phrases such as "no background elements," "without floating particles," or "no text or labels."

Next steps