Real-Time Multiply Recursive Reflections and Refractions using Hybrid Rendering

Summary, in English

We present a new method for real-time render- ing of multiple recursions of reflections and refractions. The method uses the strengths of real-time ray tracing for objects close to the camera, by storing them in a per-frame constructed bounding volume hierarchy (BVH). For objects further from the camera, rasterization is used to create G-buffers which store an image-based representation of the scene out- side the near objects. Rays that exit the BVH continue tracing in the G-buffers’ perspective space using ray marching, and can even be reflected back into the BVH. Our hybrid renderer is to our knowledge the first method to merge real- time ray tracing techniques with image-based rendering to achieve smooth transitions from accurately ray-traced fore- ground objects to image-based representations in the back- ground. We are able to achieve more complex reflections and refractions than existing screen space techniques, and offer reflections by off-screen objects. Our results demonstrate that our algorithm is capable of rendering multiple bounce reflections and refractions, for scenes with millions of triangles, at 720p resolution and above 30 FPS.

• Författare: Per Ganestam; Michael Doggett
• Avdelning/ar: Institutionen för datavetenskap; ELLIIT: the Linköping-Lund initiative on IT and mobile communication; Parallella System
• Publiceringsår: 2015
• Språk: Engelska
• Sidor: 1395-1403
• Publikation/Tidskrift/Serie: Visual Computer
• Volym: 31
• Issue: 10
• Länkar: http://dx.doi.org/10.1007/s00371-014-1021-7
• Dokumenttyp: Artikel i tidskrift
• Förlag: Springer
• Ämne: Computer Science
• Aktiv: Published
• Forskningsgrupp: Computer Graphics
• ISBN/ISSN/Övrigt: ISSN: 0178-2789