S4552-rt-voxel-based-global-illumination-gpus

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HOW IT IS USUALLY SOLVED• Accurate physics-based GI computation is extremelyexpensive• Static approximations— Flat ambient— Light maps• Dynamic approximations— Manually placed lights simulating indirect illumination— Virtual Point Lights – expensive, no occlusion— SH irradiance volumes, Light propagation volumes – no specular— Image-space approaches – incomplete scene information— Sparse Voxel Octree Global Illumination (SVOGI) – doesn’t handledynamic or large scenes well6
OUR SOLUTION• Dynamic approximation— No offline pre-computations— Handles dynamic scenes easily• Voxel Cone Tracing— “Interactive Indirect Illumination Using Voxel Cone Tracing” by CyrilCrassin, Fabrice Neyret, Miguel Sainz, Simon Green, Elmar Eisemann• Gathering information from a multi-resolution voxelrepresentation of the scene7
Page 3 and 4: WHAT IS GLOBAL ILLUMINATION?Here is
Page 5: WHAT IS GLOBAL ILLUMINATION?Here is
Page 9 and 10: SCREENSHOTS: GI9
Page 11 and 12: SCREENSHOTS: GI11
Page 13 and 14: SCREENSHOTS: FLAT AMBIENT13
Page 15 and 16: SCREENSHOTS: VOXEL-BASED AMBIENTThe
Page 17 and 18: OUR INNOVATION: 3D CLIPMAP• We st
Page 19 and 20: UPDATING THE CLIPMAP DATAYYNew exte
Page 21: INCREMENTAL UPDATES: CLIPMAP MOVESW
Page 24 and 25: VOXELIZATION FOR OPACITY1. We have
Page 26 and 27: VOXELIZATION FOR OPACITY3. Rasteriz
Page 28 and 29: VOXELIZATION FOR OPACITY5. Repeat t
Page 30 and 31: VOXELIZATION: SCENE GEOMETRY30
Page 32 and 33: VOXELIZATION: OPACITY32
Page 34 and 35: VOXELIZATION: DOWNSAMPLING 234
Page 36 and 37: VOXELIZATION FOR EMITTANCE• Alias
Page 38 and 39: MULTI-RESOLUTION VOXELIZATIONVoxeli
Page 40 and 41: LIGHT INJECTION ALGORITHMS• Simpl
Page 42 and 43: LIGHT INJECTION ALIASINGSlight chan
Page 44 and 45: CONE TRACING BASICS• Several cone
Page 46 and 47: SPARSE DIFFUSE CONE TRACING• Diff
Page 48 and 49: PERFORMANCE• Full GI is practical
Page 50 and 51: CONCLUSION• Fully dynamic GI beco
Page 52 and 53: BACKUP52
Page 54 and 55: SPARSE DIFFUSE CONE TRACINGEvery 4
Page 56:
SPECULAR BANDING REMOVALBanding in
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S4552-rt-voxel-based-global-illumination-gpus

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