Cast Shadows, step by step
Two points fix every cast shadow: the source, and the point on the ground below it.
- Place the lightA point in space. Mark it, and mark the point directly below it.
- Drop to the groundFrom the top of the object, straight down to its base.
- Ray from the sourceThrough the top of the object, and onwards past it.
- Ray from the ground pointThrough the base of the object, along the ground plane.
- Where the two crossThat is the shadow of that one point. Repeat for each corner.
Sunlight arrives parallel, so its shadows converge only through perspective. A nearby lamp makes them spread instead.
Questions about the Cast Shadows poster
- What’s on the Cast Shadows poster?
- 5 numbered steps. Two points fix every cast shadow: the source, and the point on the ground below it. Place the light — A point in space. Mark it, and mark the point directly below it.; Drop to the ground — From the top of the object, straight down to its base.; Ray from the source — Through the top of the object, and onwards past it.; Ray from the ground point — Through the base of the object, along the ground plane.; Where the two cross — That is the shadow of that one point. Repeat for each corner.. Sunlight arrives parallel, so its shadows converge only through perspective. A nearby lamp makes them spread instead.
- Who is the Cast Shadows poster for?
- Cast Shadows belongs to the Art & Design section rather than to a school year, because design is not something one grade owns. Anyone learning drawing can pin it up — a beginner, a student mid-course, or someone revising years later.
- When should you use the Cast Shadows poster?
- Use it when inventing a scene rather than copying the shadows in front of you. A wall chart earns its place by being glanceable from where the work is happening, so Cast Shadows belongs on the wall where that design work actually happens, within glancing distance, rather than filed away.
- What other posters go with Cast Shadows?
- Blocking In, Edge Quality and Ellipses sit alongside Cast Shadows in the Art & Design section. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.Blocking InEdge QualityEllipses
- Is the Cast Shadows poster free to download and print?
- Yes. Cast Shadows downloads as a free PDF with no account, no email and no watermark, like everything else in the Art & Design section. Print as many copies as you like for a home, a classroom, a library or a tutoring group; reselling the file is the only thing the licence rules out.Read the licence
- What size does the Cast Shadows poster print at?
- Cast Shadows is a vector PDF laid out for US Letter, and prints on A4 with Fit to page — the same file, no separate download. Because every mark on it is drawn rather than photographed, it stays sharp enlarged to A3, A2 or A1 at a copy shop. Colour carries emphasis only, so a greyscale print of Cast Shadows loses nothing.Printing guide
Related posters
Charts that sit alongside Cast Shadows on the same wall.
Browse every Art & Design poster, or start from the full catalogue.