Paint.NET is image and photo editing software for Windows. It has an intuitive and innovative user interface, supports layers, unlimited undo, special effects, and various useful and powerful tools. An active and growing online community provides friendly help, tutorials, and plugins.

Paint.net 5.0 is a major update that includes new features and improvements such as pen and tablet pressure sensitivity, greatly expanded GPU access to effects, adjustments and tools, and a brand new effects plugin system that includes Support for GPU rendering with Direct2D.

new function:

• The application has been updated to run on .NET 7.
• Pens and graphics tablets that support Windows Ink now support pressure sensitivity for the brush tools (Brush, Eraser, Clone Stamp, Recolor).
• The settings dialog now has a graphics section for configuring GPU and hardware acceleration settings
• Most effects and adjustments have been rewritten to perform on the GPU.Requires a Direct3D 11 compatible GPU, otherwise CPU rendering will be used
• A new, modern, high-performance effects plug-in system with support for both CPU and GPU effects. GPU effects using Direct2D’s effects system (“DirectImage”)
• The Settings dialog now has a Pens and Artboards section, which currently has a checkbox to enable/disable Windows Ink.
• The brush tool now supports path smoothing, which is enabled by default and can be toggled in the toolbar.
• The brush tool now has a spacing property on the toolbar
• You can now tap and hold the +/- buttons in the toolbar without repeatedly tapping them
• Image → Resize now has an ultra-high quality “Adaptive (best quality)” option, which is now the default
• …

Variety:

• Now requires Windows 10 or Windows 11, Windows 7 and 8.1 are no longer supported.
• Now requires a 64-bit CPU and 64-bit version of Windows, supports AMD/Intel x64 and ARM64, no longer supports 32-bit x86.
• Extensive optimization work throughout the application and rendering engine resulting in smoother and faster performance
• Layers and history windows now use the GPU for rendering
• The thumbnails in the layers window have been enlarged by 20%
• The image thumbnail list at the top of the main window is now rendered using the GPU
• Effects now run at a higher, smoother frame rate, where updates were previously limited to 20 frames per second.
• …

For more details, please check: https://www.getpaint.net/roadmap.html