Amogh N P
 In loving memory of Amogh N P — Architect · Designer · Visionary 
An Indian architecture student building a card study model at a studio desk.
Unit IModel Making & Architectural Delineation

Introduction to Model Making & Media

Why we build models — and the media we draw them with.

≈ 35 min

Architecture is invisible until it is represented — and this course is the craft of that representation, in two forms: the physical model you can hold, and the rendered drawing you can give light. This first lesson sets up both — why we build models, the kinds we build, and the freehand media we draw with.

Learning objectives

By the end of this lesson you will be able to — mapped to the course outcomes for Model Making & Architectural Delineation:

1
CO1 · Understand

Explain why architects make models, and the value a model adds over a drawing.

2
CO1 · Understand

Identify the main types of architectural model and their purposes.

3
CO2 · Understand

Recognise the freehand media of delineation and what each is good for.

4
CO2 · Apply

Choose a medium to suit the idea you want to communicate.

Models & their types

Why build models

A model gives a design mass, space and real light, and works from the first concept to the final presentation. Select a topic.[1, 2]

Seeing in three dimensions

A physical model gives a design a presence drawings cannot — you read its mass, space, proportion and the play of real light at a glance, and you can turn it, cut it and test it. Models work from the first rough concept right through to the polished presentation.[1]

From the flat to the held a drawing a model A model gives a design mass, space and real light — you can turn it, cut it and test it.
DiagramA flat drawing becoming a three-dimensional model you can hold
Kinds of model concept study presentation sectional site From the rough concept block to the detailed presentation model and the building in its site.
DiagramTypes of architectural model — concept, study, presentation, sectional and site
What each is good for

The media of delineation

Each medium says something different — line for structure, charcoal and watercolour for atmosphere, the lino-cut for bold pattern.[3, 4, 5]

MediumGood for
Pencil / graphiteSoft, correctable line and tone — for study and construction
Pen-and-inkCrisp, permanent line and hatching — for finished, graphic work
CharcoalExpressive light and shade — atmosphere and mood
WatercolourLuminous washes — sky, material, light
Collage / mixed mediaLayered, expressive images — concept and context
Lino-cut / printBold graphic pattern — studying form and repetition
The media of delineation pencil pen-and-ink charcoal watercolour lino-cut Line media carry structure; charcoal and watercolour carry atmosphere; the lino-cut prints bold pattern.
DiagramThe freehand media of delineation — pencil, pen, charcoal, watercolour and lino-cut
From record to image

Delineation — rendering the line

Delineation adds light, shade, shadow and texture so a drawing communicates a design rather than merely recording it.[6]

Delineation — rendering the line the line drawing delineated (rendered) Adding light, shade, shadow and texture turns a record into something that communicates.
DiagramA line drawing rendered with light, shade and texture
A flatlay of delineation media — pens, charcoal, watercolour and brushes.
PhotoA flatlay of delineation media — pens, charcoal, watercolour and brushes.
An expressive ink-and-watercolour architectural sketch.
PhotoAn expressive ink-and-watercolour architectural sketch.
Several architectural models of different types lined up on a shelf.
PhotoSeveral architectural models of different types lined up on a shelf.
An Indian architecture student building a card study model at a studio desk.
PhotoAn Indian architecture student building a card study model at a studio desk.
Check your understanding

Self-assessment

1. A model that explores overall form and volume with little or no detail is a:

2. Which medium is best for luminous washes that suggest sky, light and material?

3. ‘Delineation’ in architecture means:

In a nutshell

Recap

A model lets you see, hold and test an idea in three dimensions, from concept to presentation.
Know the model types — concept/massing, study, presentation, sectional and site/context.
The line media (pencil, pen-and-ink) carry structure; charcoal and watercolour carry atmosphere.
Mixed media, collage and the lino-cut borrow from art; delineation is the craft of rendering it all.
The evidence

References & further reading

  1. [1]Architectural model making — the guide (why models matter; what they reveal). First In Architecture. https://www.firstinarchitecture.co.uk/architectural-model-making-the-guide/
  2. [2]Types of architectural model — concept, study, presentation, sectional, site. Model-making overview. https://architecturalmodels.net/materials-for-architectural-models-a-comprehensive-guide/
  3. [3]Pen and ink in architectural drawing — line, hatching and character. Akers Architectural Rendering. https://www.akersarchitecturalrendering.com/blog/tag/Pen+and+Ink
  4. [4]Watercolour and tonal media in architectural rendering — atmosphere and light. Overview. https://www.archdaily.com/942862/the-evolution-of-visual-representation-in-architecture
  5. [5]A guide to printmaking — the lino-cut (relief) technique and mixed media. Jackson's Art. https://www.jacksonsart.com/blog/2017/11/13/guide-printmaking-techniques/
  6. [6]Architectural delineation and the American Society of Architectural Illustrators (ASAI, 1986). https://en.wikipedia.org/wiki/American_Society_of_Architectural_Illustrators

Further reading

  • Knoll, W. & Hechinger, M. (2007). Architectural Models: Construction Techniques (2nd ed.). J. Ross Publishing. ISBN 978-1-932159-96-7.
  • Ching, F.D.K. (2023). Architectural Graphics (7th ed.). Hoboken, NJ: Wiley — drawing systems and media.
  • Lin, M.W. (1993). Drawing and Designing with Confidence: A Step-by-Step Guide. New York: Wiley.

Sources gathered and fact-checked June 2026. Published values vary by source, sample and method — treat as indicative and confirm against the cited standard before structural use.

Design Drawing courseThe freehand fundamentals behind delineation — sketching, observation and perspective by eye.