1 / 13

Real-time Rendering Sub-Surface Scattering

Real-time Rendering Sub-Surface Scattering. CSE 781 Prof. Roger Crawfis. Subsurface Scattering: Translucency. Light enters and leaves at different locations on the surface bounces around (scatters) inside. Subsurface Scattering: Marble. Milk vs. Paint. Skin. Skin.

xenos
Télécharger la présentation

Real-time Rendering Sub-Surface Scattering

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Real-time RenderingSub-Surface Scattering CSE 781 Prof. Roger Crawfis

  2. Subsurface Scattering: Translucency • Light enters and leaves at different locations on the surface • bounces around (scatters) inside

  3. Subsurface Scattering: Marble

  4. Milk vs. Paint

  5. Skin

  6. Skin

  7. Real-time RenderingImage-based Rendering CSE 781 Prof. Roger Crawfis

  8. The traditional pipeline A possible IBR pipeline The graphics pipeline modeling animation rendering 3Dscanning motioncapture image-based rendering

  9. Image caching[Shade et al., SIGGRAPH 1996] • PrecomputeBSP tree of scene (2D in this case) • Draw nearby nodes (yellow) as geometry • Render distant nodes (red) to RGB images (black) • Composite images together • As observer moves • if disparity exceeds a threshold, re-render image

  10. Apple QuickTime VR[Chen, Siggraph ’95] • Outward-looking • Panoramic views taken at regularly spaced points • Inward-looking • Views taken at points on the surface of a sphere

  11. The Plenoptic Function Radiance as a function of position and directionin a static scene with fixed illumination • For general scenes Þ 5D function L ( x, y, z, q, f)

  12. More parameterizations Chords of a sphere L ( 1, f1, q2, f2 ) • convenient for spherical gantry • facilitates uniform sampling

  13. IBR Modellingand Rendering • Store and access only pixels • No geometry, no light simulation, ... • Input: set of images • Output: image from new viewpoint • Large set of possible new viewpoints • Interpolation allows translation, not just rotation • Lightfield, lumigraph: translate outside convex hull of object • QuickTimeVR: camera rotates, no translation • Can point camera in or out

More Related