We describe a system for non-photorealistic rendering (NPR) of virtual environments. In real time, it synthesizes imagery of architectural interiors using stroke-based textures. We address the four main challenges of such a system ­ interactivity, visual detail, controlled stroke size, and frame-to-frame coherence ­ through image based rendering (IBR) methods. In a preprocessing stage, we capture photos of a real or synthetic environment, map the photos to a coarse model of the environment, and run a series of NPR filters to generate textures. At runtime, the system re-renders the NPR textures over the geometry of the coarse model, and it adds dark lines that emphasize creases and silhouettes. We provide a method for constructing non-photorealistic textures from photographs that largely avoids seams in the resulting imagery. We also offer a new construction, art-maps, to control stroke size across the images. Finally, we show a working system that provides an immersive experience rendered in a variety of NPR styles.

@inproceedings{Klein:2000:NVE,
   author = "Allison W. Klein and Wilmot W. Li and Michael M. Kazhdan and Wagner T.
      Corr{\^e}a and Adam Finkelstein and Thomas A. Funkhouser",
   title = "Non-Photorealistic Virtual Environments",
   booktitle = "Proceedings of ACM SIGGRAPH 2000",
   year = "2000",
   month = jul,
   pages = "527--534"
}