Image Based Methods of Terrain Rendering Reimar Schubert and A Image Based Methods of Terrain Rendering Reimar Schubert and A. James Stewart Department of Computer Science, University of Toronto View Dependent Textured Meshes Spectrum of Rendering Methods eye Advantages MESH BASED Full Geometry View Dependent Unzipped Mesh Project textured mesh back into world space 4 LOD Mesh (lifted textures) View dependent textured mesh Project terrain onto plane perpendicular to viewpoint 1 View Dependent Textured Mesh Disadvantages LOD Mesh w/ Lifted Textures BILLBOARD BASED Jags Create mesh on image plane Filter for depth discontinuities 3 2 No disocclusions Multiple Internal Billboards w/ Warping External Meshed Billboard w/ Warping Unzipped Meshes Sprites with Depth Texture Mapped Billboard Ordered by quality Preliminary Work In progress: generate new triangles to fill in disocclusions 4 Generate image and mesh as before 1 Sprites with Depth Very slow to warp individual pixels Holes in final warped image External Meshed Billboard w/ Warping No disocclusions Depth discontinuity artifacts (jags) Found to be equivalent to view dependent textured meshes (see above) Unzip mesh at partition edges 3 Partition mesh by depth 2