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Hollow Cubes Quilt Block: A Stunning 3D Quilt Pattern Tutorial

Hollow Cubes Quilt Block: A Stunning 3D Quilt Pattern Tutorial
The photo above © Carol Thelen

If you're looking to create a quilt that not only keeps you warm but also serves as a captivating piece of art, the Hollow Cubes Quilt Block is an excellent choice. This quilt block features an optical illusion that gives it a three-dimensional effect, making it a standout piece in any room. In this comprehensive guide, we'll walk you through the process of creating the Hollow Cubes Quilt Block, from cutting the fabric to piecing the blocks together. Whether you're a seasoned quilter or a beginner, this tutorial will help you master this unique 3D quilt pattern.

What is the Hollow Cubes Quilt Block?

The Hollow Cubes Quilt Block is a visually striking design that creates the illusion of three-dimensional cubes on a flat surface. The key to achieving this effect lies in the strategic use of light, medium, and dark fabrics within each cube. By carefully selecting and arranging these fabrics, you can create the appearance of depth, making the cubes seem as though they are popping out of the quilt.

Materials Needed

Before we dive into the tutorial, let's gather the materials you'll need:

  • Fabric: You'll need three different fabrics for each cube—light, medium, and dark shades of the same color. For example, if you're using blue, you'll need a light blue, medium blue, and dark blue fabric.
  • Ruler: An equilateral triangle ruler (also known as a 60-degree ruler) is essential for cutting the fabric pieces accurately.
  • Rotary Cutter and Cutting Mat: These tools will help you cut the fabric strips and triangles with precision.
  • Sewing Machine: A standard sewing machine will work perfectly for piecing the quilt blocks together.
  • Iron and Ironing Board: Pressing your seams is crucial for achieving a polished finish.
  • Pins: These will help keep your fabric pieces in place as you sew.

Step-by-Step Tutorial: Creating the Hollow Cubes Quilt Block

Step 1: Cutting the Fabric

  1. Cutting Strips: Start by cutting strips of fabric. For each cube, you'll need:
    • One strip at 3 inches wide for the triangles.
    • One strip at 6 inches wide for the frames.
  2. Cutting Triangles: Using your equilateral triangle ruler, cut triangles from the 3-inch strips. Each cube will require two triangles from each color (light, medium, and dark). Stack the three fabrics together and cut them simultaneously to ensure consistency.
  3. Cutting Frames: From the 6-inch strips, cut one-inch by six-inch strips. These will serve as the frames for your triangles. Each cube will need four frame strips.

Step 2: Piecing the Block

  1. Attaching Frames: Take one frame strip and align it with the edge of a triangle. Stitch a quarter-inch seam along the edge. Repeat this process for all six triangles. Press the seams open or to the side, depending on your preference.
  2. Trimming the Frames: After attaching the frames, use your ruler to trim the excess fabric, ensuring that the frames are neatly aligned with the triangles.
  3. Adding the Second Frame: Take another frame strip and attach it to the opposite side of the triangle. Again, stitch a quarter-inch seam, press the seams, and trim any excess fabric.

Step 3: Assembling the Cube

  1. Arranging the Pieces: To create the 3D effect, arrange the pieced triangles in the correct order. Start with the light color frames at the top, followed by the medium and dark frames. The dark fabric should be on the left, and the medium on the right.
  2. Sewing the Halves: Sew the three pieces together to form one half of the cube. Repeat this process for the other half. Finger press the seams as you go to ensure they lay flat.
  3. Combining the Halves: Once both halves are complete, sew them together to form the full cube. Press the seams and trim any excess fabric or "nubs" that may interfere with the final assembly.

Step 4: Creating the Quilt

  1. Setting Triangles: To fill in the spaces around the cubes, cut four-inch strips of fabric and use your triangle ruler to cut setting triangles. These will be used to piece the quilt together.
  2. Piecing the Quilt: Arrange the cubes and setting triangles in the desired pattern. Sew the pieces together in rows, starting at the top and working your way down. Use pins to keep the pieces aligned, especially at the points where the triangles meet.
  3. Trimming the Quilt: Once the quilt top is complete, trim the edges to ensure they are even. Use the points where the triangles meet as a guide for cutting.

Step 5: Finishing the Quilt

  1. Adding Borders: If desired, add borders to your quilt to frame the design. Cut strips of fabric to the desired width and sew them around the edges of the quilt top.
  2. Quilting and Binding: Layer the quilt top with batting and backing fabric. Quilt as desired, then bind the edges to finish the quilt.

Tips for Success

  • Fabric Selection: Choose fabrics with a clear distinction between light, medium, and dark shades to enhance the 3D effect.
  • Precision Cutting: Accurate cutting is crucial for achieving the optical illusion. Take your time when cutting the triangles and frames.
  • Pressing Seams: Pressing your seams open or to the side will help reduce bulk and ensure a flat, even quilt top.
  • Laying Out the Design: Before sewing, lay out all the pieces to ensure the colors and patterns are arranged correctly. This will help you avoid mistakes and achieve the desired 3D effect.
The Hollow Cubes Quilt Block is a mesmerizing pattern that adds depth and dimension to your quilting projects. By following this tutorial, you can create a stunning quilt that showcases your skills and creativity. Whether you're making a single block or an entire quilt, the Hollow Cubes design is sure to impress. So gather your materials, follow the steps, and enjoy the process of bringing this 3D quilt pattern to life!

For more detailed instructions and visual guidance, be sure to check out the accompanying video tutorial. Happy quilting!


Watch the Full Video Tutorial Here

By following this guide, you'll be able to create a Hollow Cubes Quilt that not only serves as a functional piece but also as a stunning work of art. Whether you're quilting for yourself or as a gift, this pattern is sure to be a showstopper.

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