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쉐도우맵을 압축하여 대규모씬에 라이팅을 적용해보자

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Seongdae Kim

대규모씬이나 많은 라이트의 쉐도우를 위한 압축기법 Precomputed Voxelized-Shadows for Large-scale Scene and Many lights

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15
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18
Lit Shadowed Shadowed Shadowed — — 19
Lit Shadowed Shadowed Shadowed 20 —
Lit Shadowed Shadowed Shadowed 21 — — –
Lit Shadowed Shadowed Shadowed 22 — — –
Lit Shadowed Shadowed Shadowed 23 • 40963 • • 40962 •
Lit Shadowed Shadowed Shadowed 24 •
25 —
26 —
27 —
28 —
29 — — —
30 — —
32 — — — — —
33 — – –
34 — 28 voxel –
35 — –
— –
37 —
—
—
40 —
— 41
— 42
— — – 43
44 — — –
— – – —
—
—
48
— — — —
51 — — — — — child pointer0 unused childmask 16bit 16bit child pointer1 child pointer0 unused childmask child pointer1 child pointer2 child pointer3 child pointer4 unused childmask unused childmask
52 — — — — — — — — — — — — child pointer0 unused childmask 16bit 16bit child pointer1 child pointer0 unused childmask child pointer1 child pointer2 child pointer3 child pointer4 unused childmask unused childmask
53 — — — — 28 264 — 16Exa, 16,777,216Tera — child pointer0 unused childmask 16bit 16bit child pointer1 child pointer0 unused childmask child pointer1 child pointer2 child pointer3 child pointer4 leaf bitmask0_0 leaf bitmask0_1 leaf bitmask1_0 leaf bitmask1_1 … … … … leaf bitmask7_0 leaf bitmask7_1 unused childmask unused childmask
54 — — — — — child pointer0 unused childmask 16bit 16bit child pointer1 child pointer0 unused childmask child pointer1 child pointer2 child pointer3 child pointer4 leaf bitmask0_0 leaf bitmask0_1 leaf bitmask1_0 leaf bitmask1_1 … … … … leaf bitmask7_0 leaf bitmask7_1 unused childmask unused childmask
56 — Capture ShadowMap(GPU) (transmit it to Sys Memory) Min/Max at mip level(GPU) (transmit it to Sys Memory) SVO/DAG from shadow data
57 — Capture ShadowMap(GPU) (transmit it to Sys Memory) Min/Max at mip level(GPU) (transmit it to Sys Memory) SVO/DAG from shadow data
5858 58 Capture ShadowMap(GPU) (transmit it to Sys Memory) Min/Max at mip level(GPU) (transmit it to Sys Memory) SVO/DAG from shadow data
5959 59 Capture ShadowMap(GPU) (transmit it to Sys Memory) Min/Max at mip level(GPU) (transmit it to Sys Memory) SVO/DAG from shadow data
6060 60 Capture ShadowMap(GPU) (transmit it to Sys Memory) Min/Max at mip level(GPU) (transmit it to Sys Memory) SVO/DAG from shadow data
6161 61 Capture ShadowMap(GPU) (transmit it to Sys Memory) Min/Max at mip level(GPU) (transmit it to Sys Memory) SVO/DAG from shadow data
6262 62 Capture ShadowMap(GPU) (transmit it to Sys Memory) Min/Max at mip level(GPU) (transmit it to Sys Memory) SVO/DAG from shadow data
6363 63 Capture ShadowMap(GPU) (transmit it to Sys Memory) Min/Max at mip level(GPU) (transmit it to Sys Memory) SVO/DAG from shadow data
6464 64 Capture ShadowMap(GPU) (transmit it to Sys Memory) Min/Max at mip level(GPU) (transmit it to Sys Memory) SVO/DAG from shadow data
6565 65 Capture ShadowMap(GPU) (transmit it to Sys Memory) Min/Max at mip level(GPU) (transmit it to Sys Memory) SVO/DAG from shadow data
6666 66 Capture ShadowMap(GPU) (transmit it to Sys Memory) Min/Max at mip level(GPU) (transmit it to Sys Memory) SVO/DAG from shadow data
6767 67 Capture ShadowMap(GPU) (transmit it to Sys Memory) Min/Max at mip level(GPU) (transmit it to Sys Memory) SVO/DAG from shadow data
6868 68 Capture ShadowMap(GPU) (transmit it to Sys Memory) Min/Max at mip level(GPU) (transmit it to Sys Memory) SVO/DAG from shadow data
6969 69 Capture ShadowMap(GPU) (transmit it to Sys Memory) Min/Max at mip level(GPU) (transmit it to Sys Memory) SVO/DAG from shadow data
70 Capture ShadowMap(GPU) (transmit it to Sys Memory) Min/Max at mip level(GPU) (transmit it to Sys Memory) 70 SVO/DAG from shadow data
71 Capture ShadowMap(GPU) (transmit it to Sys Memory) Min/Max at mip level(GPU) (transmit it to Sys Memory) 71 — SVO/DAG from shadow data
72 Capture ShadowMap(GPU) (transmit it to Sys Memory) Min/Max at mip level(GPU) (transmit it to Sys Memory) 72 SVO/DAG from shadow data — — 2x2 2x2 2x2x2 Merge subtrees into one
73 Capture ShadowMap(GPU) (transmit it to Sys Memory) Min/Max at mip level(GPU) (transmit it to Sys Memory) 73 SVO/DAG from shadow data — — 4x4 4x4 4x4x4 Merge subtrees into one
7575 Root 생성 C# Code
7676 Sub nodes 생성 C# Code
7777 Sub nodes 생성 C# Code
7878 Lit or shadowed, Child 포인팅 C# Code
7979 Voxel bounds와 shadow min/max 비교 C# Code
8080 lit && shadowed 면 Intersected로 child 생성 C# Code
8181 childbit 결정 C# Code
82 C# Code
83 83 C# Code
84 C# Code
85 C# Code
86 C# Code
88
89 — 쉐도우맵 VoxelDAG 쉐도우 데이터 2D 텍스쳐 3D 데이터 옥트리 접근 UV 좌표로 변환 트리 탐색
9090 ComputeShader Code
9191 — — — — ComputeShader Code
9292 — ComputeShader Code
9393 — — — — ComputeShader Code
9494 — — — — ComputeShader Code
9595 — – ComputeShader Code
9696 — — ComputeShader Code
9797
9898 Early Leaf Termination
99
100
101
102
103
104 — — —
105 — ShadowMap 16bit SVO Compressed 최적화1 Resolve Undefined Regions 최적화2 Identical Node 4k 32MB 50.0MB 3.4MB 1.7MB 1.6MB 16k 512MB 811.8MB 34.6MB 9.9MB 8.6MB
106 — 각도 0 10 20 30 40 50 60 70 80 90 용량(MB) 2.0 6.0 7.8 8.9 9.5 10.1 9.3 6.5 1.6 0.4 각도 100 110 120 130 140 150 160 170 180 Total 용량(MB) 1.6 6.1 8.7 9.7 9.8 9.7 8.8 7.0 2.6 118.3
107 — — 4k 8k 16k 32k 64k 128k 256k 용량(MB) 1.9 4.6 10.1 22.6 51.3 119.1 289.8 빌드시간(sec) 0.6 2.1 7.4 24.6 87.7 329.4 1262.9
108
109 — — —
110 — — VxShadows Cascade Distance 1000m 2000m 3000m 4000m 5000m 6000m 7000m DrawCalls +1 +35 +1994 +4636 +6403 +7811 +8829 +9806 RTX 2080 106~111 105~107 99~101 95~98 91~94 89~91 88~90 87~89 GTX 1060 78~80 NA NA NA NA NA NA NA
111 — — VxShadowMap Resolution 4k 8k 16k 32k 64k 128k 256k RTX 2080 0.41ms 0.44ms 0.47ms 0.59ms 0.52ms 0.54ms 0.54ms RTX 2060 0.69ms 0.74ms 0.79ms 0.83ms 0.87ms 0.90ms 0.92ms GTX 1060 1.53ms 1.70ms 1.78ms 1.86ms 1.98ms 1.99ms 2.02ms
112 — — VxShadowMap Resolution 4k 8k 16k 32k 64k 128k 256k RTX 2080 0.71ms 0.76ms 0.82ms 0.86ms 0.90ms 0.94ms 0.96ms RTX 2060 1.20ms 1.30ms 1.40ms 1.46ms 1.54ms 1.58ms 1.63ms GTX 1060 2.65ms 2.94ms 3.12ms 3.27ms 3.44ms 3.54ms 3.60ms
113 — — — — — — —
114 Galaxy Note9 Galaxy Note8
115 — — — — — — — —
116 — — — — — — — — — —
117 [W. Engel] Cascaded Shadow maps, Online, 2016 [E. Eisemann et al] Real-Time Shadows, 2011 [V. Kämpe et al] High Resolution Sparse Voxel DAGs, Transactions on Graphics 32(4), 2013 [E. Sintorn et al] Compact Precomputed Voxelized Shadows, ACM Transactions on Graphics 33(4), 2014 [V. Kämpe et al] Fast, Memory-Efficient Construction of Voxelized Shadows, IEEE Transactions on Visualization and Computer Graphics, Vol 22, No. 10, 2016 [L. Scandolo et al] Compressed Multiresolution Hierarchies for High-Quality Precomputed Shadows, EUROGRAPHICS, 2016 [S. Sengupta] Scan primitives for GPU computing, Proceedings of the 22nd ACM SIGGRAPH/EUROGRAPHICS symposium on Graphics hardware Pages 97-106 , 2007
seongdae@unity3d.com Q&A UnrulyHeroesbyMagicDesignStudios—MadewithUnity 118
Appendix
Appendix 120 — — — —
121 — — —
122 — — — — — — — — — — —
123 — — — — — — — — — — —
124124 — — –
125125 — — –
126126 — — –
127127 — — –
128128 — — –
129129 — — –
130130 — —
131131 — —
132132 — —
133133 — —
134134 — —
135135 — —
136 C# Code
137 C# Code
— — — — — – – 138
139 C# Code
140 — — —
141 — — —
142 — — — —
143 — — —
144 — — — —

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