Tailorable truncated retroreflector array (TTRA) technology can be used to design ceiling medallions, which can be made entirely of plastic, where the reflective surfaces of the ceiling medallions provide a unique and beautiful glow that changes with the source or sources of light encountering the surfaces and the location of the viewer relative to the surface. Figures 1 and 2 each show four pictures taken from four different view angles of a two prototype ceiling medallion that were created using a deposition 3D printer. Both prototypes were created using an isosceles triangle truncating object with a 45° non-congruent angle and 0° truncation rotation.

Figure 1. Pictures taken from four different view angles of a first ceiling medallion prototype created using an isosceles triangle truncating object with a 45° non-congruent angle and 0° truncation rotation

Figure 1. Pictures taken from four different view angles of a first ceiling medallion prototype created using an isosceles triangle truncating object with a 45° non-congruent angle and 0° truncation rotation

Figure 2. Pictures taken from four different view angles of a second ceiling medallion prototype created using an isosceles triangle truncating object with a 45° non-congruent angle and 0° truncation rotation

Figure 2. Pictures taken from four different view angles of a second ceiling medallion prototype created using an isosceles triangle truncating object with a 45° non-congruent angle and 0° truncation rotation

Figures 3 and 4 depict third and fourth prototype ceiling medallions produced using a resin 3D printer. The third prototype was created using an isosceles triangle truncating object with a 45° non-congruent angle and 15° truncation rotation and the fourth prototype was created using a right isosceles triangle truncating object with a 15° truncation rotation.

Figure 3. Pictures taken from four different view angles of a third ceiling medallion prototype created using an isosceles triangle truncating object with a 45° non-congruent angle and 15° truncation rotation

Figure 3. Pictures taken from four different view angles of a third ceiling medallion prototype created using an isosceles triangle truncating object with a 45° non-congruent angle and 15° truncation rotation

Figure 4. Pictures taken from four different view angles of a fourth ceiling medallion prototype created using a right isosceles triangle truncating object with a 15° truncation rotation

Figure 4. Pictures taken from four different view angles of a fourth ceiling medallion prototype created using a right isosceles triangle truncating object with a 15° truncation rotation

Figures 5 and 6 provide closeup views of the retroreflector and light-redirecting portions of the reflective surfaces of the third and fourth ceiling medallion prototypes.

Figure 5.  Close up view of the third ceiling medallion prototype

Figure 5. Close up view of the third ceiling medallion prototype

Figure 6. Close up view of the fourth ceiling medallion prototype

Figure 6. Close up view of the fourth ceiling medallion prototype