This document discusses approaches for interactive stereo rendering of 3D environments with non-planar projections. It compares a geometry-based approach (GBA) and an image-based approach (IBA) in terms of implementation complexity, memory footprint, rendering performance, and image quality. The GBA outperforms the IBA in rendering and image quality but is more complex and has a larger memory footprint for high field-of-view projections. The IBA is easier to implement but has artifacts from cubemap sampling. Future work is proposed to improve the IBA's performance and image quality.

1. Interactive Stereo Rendering For Non-Planar Projections of 3D Virtual Environments Matthias Trapp , Haik Lorenz, Jürgen Döllner Hasso-Plattner-Institute, University of Potsdam, Germany GRAPP 2009 International Conference on Computer Graphics Theory and Applications Lisboa, Portugal

3. Anaglyph Results Cylindrical Projection

4. Anaglyph Results Spherical Projection

8. Single-Pass Render to Dual-Cubemap

9. Layered Rendering – Geometry Shader

12. IBA Performance Evaluation (Anaglyph) 0.45 0.11 2 3,210,162 4.13 0.39 1 8.95 0.84 1 29.23 6.37 1 0.60 0.09 1 3.57 0.57 2 549,665 7.82 0.80 2 236,276 20.93 6.01 2 34,596 FPS GTX 280 FPS 8800GTS Cubemap Passes #Triangles

13. GBA-IBA Comparison – Rendering Performance 4.14 0.93 2.83 0.41 3210162 9.11 3.49 9.4 2.58 540655 35.77 12.42 24.51 6.04 236276 52.15 31.32 42.55 20.66 34596 GBA-GTX GBA-GTS IBA-GTX IBA-GTS Triangles

16. GBA-IBA Comparison – Binary Wrap Up   Overall Rating   Implementation Complexity   Memory Footprint   Rendering Performance   Image Quality   Stereo Functionality IBA GBA Comparison Criteria