A presentation I did for China GDC 2011. I cover the basic of visibility optimization as well as present some practical examples of visibility systems used in modern video games.

1. Visibility Optimization for Games Sampo Lappalainen Lead Programmer Umbra Software Ltd.

5. Game World

6. Our Villain

7. Our Hero

8. Screen Shot

12. Visibility Optimization by Level Design

14. Visibility Optimization by Technology

15. Visibility Optimization by Technology

24. Spatial hierarchies

26. View Frustum Culling

27. View Frustum Culling

31. Testing from coverage buffer

32. Testing from coverage buffer

33. Testing from coverage buffer

34. Testing from coverage buffer

35. Testing from coverage buffer

36. Testing from coverage buffer

37. Testing from coverage buffer

38. Testing from coverage buffer

42. Issuing Occlusion Queries disableColorWrite(); disableDepthWrite(); startQueryCounter(); renderObjectBounds(); stopQueryCounter(); enableColorWrite(); enableDepthWrite(); if (query->getResult() > 0) renderObject();

44. Issuing Occlusion Queries

45. Issuing Occlusion Queries

46. Issuing Occlusion Queries

48. Batching Occlusion Queries disableColorWrite(); disableDepthWrite(); for (each query) { startQueryCounter(); renderObjectBounds(); stopQueryCounter(); } enableDepthWrite(); enableColorWrite(); for (each query) { if (query->getResult() > 0) renderObject(); }

49. Batching Occlusion Queries

51. Latent Occlusion Queries

53. Latent Occlusion Queries

54. Latent Occlusion Queries

55. Latent Occlusion Queries

64. Hierarchical Culling

67. Hierarchy Traversal

68. Hierarchy Traversal

69. Hierarchy Traversal

72. Dynamic Objects

73. Dynamic Objects

77. Multi-core culling