We describe a method allowing users to walk through 3D scenes using Macromedia Flash player. The method is optimised for low data transfer rates and low demands on the displaying device, which makes it suited especially for mobile devices. The walkthroughs are partially pre-computed on a server and partially calculated directly on the PDA. Non-photorealistic rendering is used for more eye-pleasing results and for achieving higher data compression. Keywords Flash, 3D walkthroughs, non-photorealistic rendering, mobile computing, user interfaces