유니티3D에서의 그래픽 최적화를 위한 가이드.

1. 그래픽 최적화
어디까지 해봤니
- Unity Field Engineer 오지현

2. Image : 무사, Implosion, Z-rush, 히어로즈 아레나

3. Bottleneck
Draw Call
Batching (Pros, Cons)
Profiling
Profiling Sample
Level Of Detail
Lighting (Image Based Lighting)
Physically Based Rendering

4. Image : volvo

5. Bottleneck
Draw Call
Batching (Pros, Cons)
Profiling
Profiling Sample
Level Of Detail
Lighting (Image Based Lighting)
Physically Based Rendering

6. Optimization = Removing Bottleneck

7. CPU
GPU
Frame
End
Frame
start
Bottleneck?

8. CPU
GPU
Frame
End
Frame
start

9. CPU boundary VS GPU boundary
CPU
GPU
Frame
End
Frame
start

10. Logic AI Physics
Loading GC ...
CPU boundary

11. GPU boundary
Polygon Texture Filtering
Lighting Framebuffer
Shader Overdraw ...

12. Bottleneck
Draw Call
Batching (Pros, Cons)
Profiling
Profiling Sample
Level Of Detail
Lighting (Image Based Lighting)
Physically Based Rendering

13. CPU
DRAW!
Draw Call in a narrow sense
GPU
OK

14. CPU
DRAW!
TEXTURE!
SHADER!
VERTEX BUFFER!
ALPHA BLENDING!
TRANSFORM
CHANGE STATES
Draw Call in a broad sense
GPU...
USE Z-BUFFER!

15. CPU (App)
GPU
COMMAND COMMAND COMMAND COMMAND COMMAND
Set Texture Set Shader
Use Blending
Set VBO
Draw
Command Buffer

16. +Draw Call
Logic AI Physics
Loading GC …
CPU boundary

17. Bottleneck
Draw Call
Batching (Pros, Cons)
Profiling
Profiling Sample
Level Of Detail
Lighting (Image Based Lighting)
Physically Based Rendering

18. Batch(in Rendering Statistics Window)
= Draw Call
+ Setting Shader + Setting Blending
+ Setting Texture + Setting Vertex Buffer
+ ...

19. Batching =
1 batch for
many objects

20. Material A Material B
Mesh 1 Mesh 2 Mesh 1 Mesh 3
Batch Batch
s
c
e
n
e

21. Asset : Top-down Sci-Fi

22. Static Batching
VS
Dynamic Batching

23. Static Batching do this on loading

24. Dynamic Batching do this on Run-time
GPU
Vertex BufferScene

25. Dynamic Batching: limitations
Overhead for collecting vertices.
- Not for Skinned Mesh.
- Less than 300 vertices per mesh.
(position, normal, uv0)

26. Unity Frame Debugger

28. Bottleneck
Draw Call
Batching (Pros, Cons)
Profiling
Profiling Sample
Level Of Detail
Lighting (Image Based Lighting)
Physically Based Rendering

29. Analyze your Bottleneck
Measure correctly
Average value
Diverse situation
Per Target Device

30. CPU : A5
GPU : PowerVR SGX535
Resolution : 1024 x 768
CPU : A5X
GPU : PowerVR SGX543
Resolution : 2048 x 1536
Performance ?
Episode of

31. Unity Profiler
CPU
GPU

32. Simple test
High Polygon model VS Low Polygon model
Expensive Shader VS Cheap Shader .
High rez texture VS Low rez texture

33. Deep GPU Profile
Vendor Profiler tools

34. Qualcomm Adreno Profiler

35. Mali Graphics Debugger

36. ARM DS-5
http://community.arm.com/docs/DOC-9414

37. iOS GPU profiler

38. Bottleneck
Draw Call
Batching (Pros, Cons)
Profiling
Profiling Sample
Level Of Detail
Lighting (Image Based Lighting)
Physically Based Rendering

39. LG G-pad ( Adreno 320, 1920 X 1200)
Deferred Render
GPU Skinning
MatCap Shader
Lightmap
15K Polygons

40. Player Settings -> GPU Skinning

41. Skinning
GPU
CPU
or
Asset : Succubus Monster 2.0
Player Settings > Rendering

42. GPU :
Vertex
Shader
Buffer
GPU Skinning with Transform Feedback
Open GL ES 3.0 ~

43. CPU :
NEON
Buffer
CPU Skinning with NEON SIMD

44. NEON TM
X1 + =X2 X3
X1 + =X2 X3
Y1 + =Y2 Y3
Z1 + =Z2 Z3
W1 + =W2 W3
Single Instruction
Multi Data
Single Instruction
Single Data

45. GPU Skinning -> CPU Skinning
-9ms

47. cmd > adb.exe shell setprop debug.egl.profiler 1
image : Adreno Profiler user guide

49. Mobile/Unlit (support Lightmap)
-17ms

51. Level Of Detail
Image : Infinity Tap SF

52. ASSET : Armored Golem
Per Pixel Lit
Normalmap
Per Vertex Lit

53. LOD Plugins in Asset Store

54. Normalmap X
15K -> 7K Poly
LOD
-3ms

56. Deferred -> Forward
-5ms

57. Image : FPS Hangar
17 FPS (57ms)
iPhone 6 : PowerVR GX6450 1334 X 750

58. Vertex Pixel

59. Tile Based Deferred Rendering

62. 39 FPS (25ms)
iPhone 6 : PowerVR GX6450 1334 X 750
SSAO SunShaft

63. Bottleneck
Draw Call
Batching (Pros, Cons)
Profiling
Profiling Sample
Level Of Detail
Lighting (Image Based Lighting)
Physically Based Rendering

64. image : http://www.aversis.be/tutorials/vray/vray-20-gi-methods.htm

66. Texture
Image Based Lighting
Unlit lighting
DiffuseWrap MatCap

67. Toon Shading (Diffuse Wrap)

68. MatCap (Material Capture)
IMG : http://www.cgarena.com/freestuff/tutorials/misc/photoreal/

69. X
( )+ =
MatCap Shading

71. Standard Shader
PC Ver. Mobile Ver.

72. We are optimizing more

73. Use less textures
ASSET : Many-Worlds

74. Use Secondary Maps

75. 4.6.3~

76. Q & A
유니티 개발자 커뮤니티
유니티허브
ozlael.oz ozlael
ozlael.egloos.com
Thank you