This document provides guidance on optimizing graphics in Unity. It discusses common bottlenecks like draw calls and provides techniques for reducing them, such as batching and profiling. Specific optimization techniques covered include image-based lighting, shadow mapping, physically based rendering, and level of detail systems. The document emphasizes identifying and addressing bottlenecks through profiling on target devices.

1. Optimizing Graphics
Guide
John Oh, Unity Technologies Korea

2. 그래픽 최적화
어디까지 해봤니
- Unity Field Engineer 오지현

4. Image : 영웅, 레이븐, Z-rush

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

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

7. Optimization = Removing bottlenecks

8. CPU
GPU
Frame
End
Frame
start
Bottleneck?

9. CPU
GPU
Frame
End
Frame
start

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

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

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

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

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

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

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

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

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

19. 1 Batch(in Rendering Statistics Window)
= Draw Call
+ Setting Shader + Setting Blending
+ Setting Texture + Setting Vertex Buffer
+ ...

20. Batching =
1 batch for
many objects

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

23. Static Batching
VS
Dynamic Batching

24. Static Batching do this on loading
Additional memory

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

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

27. Unity Frame Debugger

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

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

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

32. Unity Profiler
CPU
GPU

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

34. Deep GPU Profile
Vendor Profiler tools

35. Qualcomm Adreno Profiler

37. Mali Graphics Debugger

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

39. iOS GPU profiler

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

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

43. Texture
Image Based Lighting
Unlit lighting
DiffuseWrap CubeMap MatCap

44. Toon Shading (Diffuse Wrap)

45. Cube map
IMG : https://seblagarde.wordpress.com/2012/06/10/amd-cubemapgen-for-physically-based-rendering/
+Z
-Z
-X +X
+Y
-Y

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

48. X
( )+ =
MatCap Shading

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

51. Unity’s shadow = Shadow Map
Heavy Pixel Shader
+ 2X ~ 5X Draw Call
Use Low Option

52. Planar Shadow
Image : Infinity Tap SF

53. See Also : http://ozlael.egloos.com/4070775
Planar Shadow for Skinned Mesh

54. Lightmap for static meshes

56. Standard Shader
PC Ver. Mobile Ver.

57. We are optimizing more

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

59. Level Of Detail
Image : Infinity Tap SF

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

61. LOD Plugins in Asset Store

62. 4.6.3~

63. Day1 14:00 GB1
Unity 5를 이용한 글로벌 일루미네이션
Day1 16:10 Orchid
유니티 최적화 테크닉 총정리
Day1 17:10 GB1
퍼포먼스와 새로운 UI
Day2 14:00 GB2
Probe light를 활용한 모바일 플랫폼에서의 게임 환경 구축
Day2 15:00 Orchid
3DS MAX 멘탈레이로 유니티엔진 정적 라이팅하기
Day2 16:10 GB 1
퍼포먼스
See Also

64. Q & A
유니티 개발자 커뮤니티
유니티허브
ozlael.oz ozlael