How To…Sketch with “Live” 3D Models

morpholio trace
3 min readSep 29, 2018


Imagine if you could have a 3D model inside your sketchbook. Then, imagine that it would automatically generate perspective lines for you. And now, imagine that you could fly between views to present your work. Would you believe it?

Today, meet Drag’n’Fly­ — the new way to sketch over 3D models. It’s truly this simple:

Images by author and illustrator Jim Keen.

1. Import your 3D Model

Any OBJ , STL, DAE, FBX, 3DS, or USDZ file will work. Simply, tap the 3D file icon or “Drag and Drop” in your file. Not seeing these buttons? Ensure you have the latest update here.

Pro Tip:

When you export your 3D model be sure you check the following:
1. Model units are in meters or feet.
2. Model is at the origin (0,0,0)
3. ONLY mesh objects are in your file (no curves, splines, NURBS surfaces, etc).


2. Set Infinite Views

Tap the “+” or simply move the screen to spin, zoom or fly around your 3D file. Set as many views as you want by tapping the check. When you’re ready to start drawing just tap “Done.” HINT: Tap the model to re-center or outside the model to zoom out. Long press views to edit.


3. Draw on Auto-Generated Perspective Grids

Smile. You will notice that Trace sets up the perspective lines and vanishing points for you. Simply draw away. More information on drawing perspectives here. When finished tap the 3D button to get more views and previews.


4. Fly From Sketch to Sketch to Sketch

Ready for some fun? Simply tap any preview and fly to that view. Can you imagine a better way to present your work?

If you want to see Drag’n’Fly in use, below is a video you might enjoy, featuring our friends at Shapr3D.

Morpholio Trace & Shapr3D Join Forces

Morpholio captured master illustrator and author Jim Keen as he moves from 3D Model to full architectural illustration.

What is Morpholio Trace — Sketch Cad?

Awarded ‘Best Apps’ for architects, landscape architects and interior designers, Trace is the dream architecture drawing software. Perfect with iPad and Apple Pencil, Trace combines the beauty and speed of sketching with the intelligence and precision of CAD. Whether you’re making initial project concepts, schematic sketches and design details or just working on site visits with construction administration and high-res PDF drawing set markups, Morpholio Trace is everything you need to be an architect, landscape designer or interior designer in one amazing app.

Welcome to your new favorite drawing app. Learn more about Morpholio Trace.

Why Morpholio Trace for Architects and Interior Designers?

Morpholio Apps are not only the best apps for architects, interior designers, engineers, urban planners and landscape architects, they also now work as a perfect compliment to, and seamlessly with, all of your favorite architectural and interior design software. This includes Autodesk AutoCad, TinkerCad, Revit, SketchUp, Rhino, Pinterest, Adobe Photoshop, Shapr3D, UMake and many more. In addition, your Apple iPad, iPhone and Apple Pencil will never be more exciting to use as Morpholio’s suite of drawing, design and mood board apps become even more essential in your design process.

Download Morpholio Trace for your iPad or iPhone.