To create a high-definition (HD) vector wallpaper featuring the Orlando Museum of Art, you can use a tool like Inkscape or Adobe Illustrator.

Here's a simple recipe to get started:

1. Open your preferred vector graphics editor and create a new document with the desired dimensions for your wallpaper.
2. Search for "Orlando Museum of Art" on Google Images to find high-quality images of the museum's architecture or artwork.
3. Use the image as a reference, and draw or import the relevant elements into your vector graphics editor.
4. Add colors, textures, and patterns to enhance the design.
5. Save the file in PNG format.

Alternatively, you can use online tools like Canva or Vector Magic to create your HD vector wallpaper. These tools offer pre-made templates and a user-friendly interface for designing vector graphics.

Note: You can also explore other sources of high-quality images, such as Unsplash or Pexels, which offer free and high-resolution photos that you can use for personal or commercial purposes.