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T-shirt Penrose triangle. Optical illusion in the shape of a triangle with a 3d effect produced by the contrasting colors.

Illusion triangle Penrose t-shirt

Penrose triangle T-shirt, optical illusion. Impossible triangle, isosceles triangle with 3d effect that creates an optical illusion. This triangle cannot exist but the brain reads the geometric contrast as a solid shape.

Penrose Triangle realized in three distinct colors that you can modify, by choosing close colors of different shades (dark green, light green and medium green for example, or more or less dark reds.)

Create your t-shirt, mug, tote bag optical illusion online with this special vector design for t-shirt printing.

Technical features of the design

  • Number of colors: 3
  • Minimum size for flex and flock printing: 3,6 cm X 3,6 cm
  • Type of drawing: Flat surfaces

Available print types

  • Flex printing (smooth)
  • Flock printing (velvety)
  • Digital Transfer on t-shirt
  • Thermo sublimation on cases and mugs
  • Laser Transfer
Customization steps in the designer, customize an original product step by step.

Open the Designer in a new tab : t-shirt Illusion triangle Penrose

Orders, security and Spreadshirt guarantee

The Spreadshirt guarantee and the security of your online purchase. Data security and management of orders and returns.

The printing of t-shirts and accessories, delivery and order management as well as returns are processed by Spreadshirt.

The secure payment is handled by the Spreadshirt platform. Your personal data does not pass through the website.

The Spreadshirt Satisfaction Guarantee is the right to exchange within 30 days from the date of the order if your personalized item does not suit you. You can choose between:

  • Exchange for a new product
  • Exchange for a voucher to be redeemed towards your next order

The price of t-shirts and items is indicated in the gallery. The price of the t-shirt + pattern + print is displayed when you choose the size and number of items to order in the designer. The price depends on the type of printing chosen, the complexity of the design, and the number of colours to be printed.

All the information on order tracking and returns are available on the Spreadshirt website.

Customization: Spreadshirt designer's user manual

Impossible 3D triangle t-shirt to create and customize online

Create an impossible Penrose triangle t-shirt


T-shirt optical illusion, impossible 3D triangle to customize online.

Impossible triangle drawn in three colors in customizable vectorial solid colors. This format is particularly suitable for t-shirt printing because it allows you to enlarge the design at will while maintaining the precision of the lines, and it allows you to change the colors. The triangle is isosceles. It is what is called a Penrose triangle, a simple optical illusion that forces the brain to see geometric volume where the shape is necessarily flat. The optical illusion is reinforced by the fact that each side of the volume is of a different color, creating a shadow and light effect that completes the illusion. Click on the triangle to customize it and bring up the formatting options. The design colours can be adjusted at the designer's right. The colour of the t-shirt can be adjusted on the right, once you have clicked on the garment. Select colors from the same family and from lightest to darkest for the triangle. White grey black, or light grey medium grey black, for example. Or fuchsia red pink, or three shades of green, etc. And choose a color that contrasts well with the t-shirt or stand. To align the triangle with the printing area, use the markers that appear when you drag it, they indicate the middle. The t-shirts available for customization are visible at the top of the left menu. T-shirts for men or women, long or short sleeves, hoodies or tank tops, etc. choose from a wide range of clothing. Many accessories are also available for printing, customizable cups and mugs, bags, phone cases, etc.

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