Schedule

: A new "smooth corner" style was introduced, allowing designers to adjust the radius of individual corners to create "squircles," a signature aesthetic in Apple's own hardware and software design language. Professional Feature Set

: Performance was significantly boosted, allowing users to preview and open large, complex documents—such as mockups—much faster than in previous versions.

While 3.1.1 was a point release focusing on stability and refinement, it sat upon the "Marble" foundation that expanded Pixelmator's professional reach:

The 3.1.1 update was anchored by several critical technical advancements that enhanced the efficiency and versatility of the application: