Electric Scooter Styling: From Sketch to 3-D Concept in Autodesk Alias

The problem

Electric scooters free designers from fuel tanks and engines, but the floorboard battery, hub motor and charging port still set hard points. Many student concepts look good as sketches and fall apart in 3-D because they ignore the package or use messy surfaces. A first Alias project should teach the full path from package, to sketch, to curves, to surfaces that read well in highlights.

Objectives

• Build a 2-D package drawing of rider, battery, motor, wheels and storage for an example scooter.
• Develop a form direction with sketches over the package in Alias Paint or on paper.
• Build front, side and top curve networks with low-degree, low-span curves.
• Create body panels with Skin, Rail and Square surfaces and symmetry.
• Check highlights with Zebra and curvature shading and produce presentation renders.

What you need

Key concepts

Package drawing

A side and top view of all hard points, such as wheels, battery, motor, rider and storage, that the styled body must cover and clear.

Curve quality

Low-degree curves with few spans give smooth surfaces. Excess CVs create waves that show in highlights.

Highlight lines

Reflections on a shiny surface. Smooth, evenly spaced zebra stripes indicate good form; kinks and wobbles reveal surface faults.

Symmetry modelling

Building one half and mirroring across the centre plane keeps both sides identical and halves the work.

Step-by-step guide

1. 1

   Draw the package

   For an example scooter with 12-inch wheels, a 1300 mm wheelbase, a 2 kWh floorboard battery, a rear hub motor and under-seat storage, draw the package in side and top view. Place a small and a large rider outline using measured or published anthropometric data for seat height, foot position and reach. Mark lamp, mirror, number plate and charging port positions as hard points the body must respect.

   Checkpoint: A dimensioned package drawing showing every hard point and the rider envelope.

2. 2

   Sketch concept directions

   Place the package as an Image Plane in the side view in Alias. On a canvas, sketch three or more directions over it with the Paint brushes, varying the stance, the main line from front apron to tail and the character lines along the side panel. Keep the hard points visible on a separate layer so each idea respects them. Pick one direction and write down why it was chosen.

   Checkpoint: Three side-view sketches over the package and a short rationale for the chosen direction.

3. 3

   Set up the model

   Create a new file with units in millimetres and the vehicle centre plane on the XZ plane. Import the package as curves or images in the side, top and front views at the correct scale, and check scale against a measured dimension such as the wheelbase. Organise layers for package, sketches, curves and surfaces, and lock the reference layers so they cannot be moved by accident while modelling.

   Checkpoint: Reference images and package curves align across views and a measured wheelbase matches the package.

4. 4

   Build key curves

   Trace the main side-view profile, the plan-view outline and key cross-sections with CV curves of degree 3 to 5 and as few spans as possible. Project or intersect curves between views to get true 3-D character lines. Turn on the curvature comb for each curve and smooth any curvature reversals unless they are intended, editing CVs rather than adding more of them.

   Checkpoint: Every key curve has a smooth curvature comb with no unintended inflections.

5. 5

   Surface the front apron and leg shield

   Use Skin or Rail Surface between the profile and section curves to create the front apron and the leg shield. Build one side only and work with symmetry about the centre plane. Keep surface spans low and aligned with the main curves so isoparms flow with the form. Use Square on four-sided patches where you need control of continuity at every boundary.

   Checkpoint: The front surfaces show smooth zebra stripes, and the symmetry seam shows no break in the stripes.

6. 6

   Surface the side panels and tail

   Create side panels over the storage and battery area, the seat base and the tail with Rail or Skin surfaces. Use Align to make boundaries meet neighbours with tangent (G1) continuity, which is enough for a first concept, then try curvature (G2) on the most visible boundary. Add a Surface Fillet between panels where the sketch shows a soft blend rather than a crease.

   Checkpoint: Zebra stripes cross panel boundaries without breaks at G1 boundaries, and the package still fits inside the body.

7. 7

   Add details

   Model the headlamp and tail lamp volumes, floorboard, handlebar cover and a charging port door as simple surfaces trimmed into the body. Use Project and Trim to cut openings, and give each opening a short return surface so it reads as a real part rather than a hole. Keep detailing simple, clean and consistent with the chosen sketch rather than adding many small features.

   Checkpoint: Trimmed openings have clean edges and no surface gaps visible in shaded mode.

8. 8

   Evaluate surfaces

   Use Diagnostic Shading in Zebra and curvature modes to inspect every panel from several viewing angles. Fix dents and wobbles by editing CVs or rebuilding surfaces from cleaner curves rather than adding spans. Cut sections through the body at the battery, seat and wheels with the Evaluate tools to confirm the package and wheel travel clear the inside of the body.

   Checkpoint: A set of zebra screenshots before and after fixes, and section checks showing the package clears the body.

9. 9

   Render and present

   Assign paint, plastic, chrome and lamp lens materials in Alias, or export to VRED, KeyShot or SOLIDWORKS Visualize. Render three-quarter front, side and rear views and one view with the package shown through a cut-away. Make a presentation board with the package, sketches, model and renders, stating clearly that the design is a student concept and not based on any existing product.

   Checkpoint: A presentation board with renders and a package cut-away that explains the design.

Testing & validation

• Package hard points and rider envelope fit inside the body and clear moving parts.
• Zebra stripes are continuous across boundaries and the symmetry seam.
• Key curves show clean curvature combs.
• Model scale is checked against a known dimension.

Expected results

A package-driven electric scooter concept modelled in Alias with clean curves and surfaces, highlight checks and presentation renders.

Take it further

• Increase key boundaries to G2 and compare highlights.
• Export panels to SOLIDWORKS and thicken them into parts.
• Make a 3-D printed scale model.
• Run a simple Flow Simulation of the rider and body for drag.

Viva and review questions

Learn it at DIYguru

These DIYguru courses and programmes teach what this project needs.