Text to CAD

Master the art of creating 3D models through natural language

Writing Effective Prompts

The key to getting great results with Ragnar is being specific and providing context. The more information you give about dimensions, purpose, and requirements, the better your model will be. Don't worry about using perfect technical terms—describe it how you naturally would, and Ragnar will understand.

Prompt Writing Principles

Be Specific

Instead of 'make a box', say 'create a storage box 150mm x 100mm x 50mm with 3mm thick walls'

Include Measurements

Provide exact dimensions when you need precision, or let Ragnar choose appropriate sizes

Describe Purpose

Explain what the part is for—this helps Ragnar make intelligent design decisions

Specify Constraints

Mention requirements like 'minimum 2mm wall thickness for 3D printing' or 'needs to fit M4 screws'

Use Natural Language

You don't need CAD terminology—describe it as you would to a friend

Working with Measurements

Ragnar uses millimeters (mm) as the default unit. You can specify exact measurements like '50mm diameter' or let Ragnar choose appropriate dimensions based on your description. For other units, simply specify them: '2 inches wide' or '10cm tall'. If you don't provide measurements, Ragnar will select sensible defaults based on the object type and purpose.

Example Prompts - From Simple to Complex

Ragnar will create a cube with default dimensions

Create a cube

Specifies exact size

Create a 50mm cube

Detailed specifications for a practical part

Create a hollow box, 100mm x 60mm x 40mm exterior, 3mm wall thickness, open top

Functional description with specific requirements

Design a laptop stand that elevates the screen 15cm, has ventilation slots, and a cable management cutout on the right side

Technical specifications using engineering terms

Make a parametric gear: 24 teeth, module 2, 20mm face width, with a 12mm center bore and 3mm keyway

Refining Your Design

After Ragnar creates your initial model, you can refine it through conversation. Say things like 'make it 20mm taller', 'add rounded corners with 5mm radius', or 'create a hole for an M6 bolt in the center'. The AI remembers the context of your conversation and will modify the existing design accordingly.