Rendering Techniques in Gears of War 2 - Unreal Engine

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• Goals: Gore Goals – No seams between breakable pieces (Gears of War 1 used rigid 1-bone skinning) – Dismember skinned meshes (e (e.g. g ragdolls) – Hand-modeled internals – Minimal impact on undamaged meshes
Gore Mesh • Artists make two versions of the skinned mesh • Undamaged mesh with no overhead • Gore mesh with additional information: – Completely independent of the undamaged mesh – Full freedom to hand-model cuts and guts – Can use different/additional textures and shaders – Pre-cut with all gore pieces separated
Page 1 and 2: Rendering Techniques in Niklas Smed
Page 3 and 4: About Gears of War 2 • 93% Metacr
Page 5 and 6: Topics p Niklas Smedberg • Gore t
Page 10 and 11: Locust gore mesh • Picture: Locus
Page 12 and 13: Elaborate gore mesh • Picture: Ub
Page 14 and 15: Data-driven Data driven Gore • Se
Page 16 and 17: Data-driven ata d e Go Gore, e, 2 o
Page 18 and 19: Scripted Gore • Set up p in ggame
Page 20 and 21: Data-driven Data driven gore #1 •
Page 22 and 23: • Screenshot: Meatshield 3 Data
Page 28 and 29: • Movie: Chainsaw Scripted gore
Page 30 and 31: Blood Techniques • Many y differe
Page 32 and 33: Decal Features • Decal system y m
Page 34 and 35: Decal Optimizations • One drawcal
Page 36 and 37: Blood Smears, , 1 of 4
Page 38 and 39: Blood Smears, , 3 of 4
Page 40 and 41: Screen-space Screen space Blood Eff
Page 42 and 43: Surface‐space Surface space Blood
Page 44 and 45: Fluid Simulation • Using g our Un
Page 46 and 47: Blood Techniques • Movie: Riftwor
Page 48 and 49: Blood Techniques • Movie: Riftwor
Page 50 and 51: About Daniel Wright • Joined Epic
Page 52 and 53: • Gore techniques q • Blood tec
Page 54 and 55: Background g • Hundreds of static
Page 56 and 57: Background g - Some of these are do
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Background • Hundreds of static l
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Incident Lighting Representation
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Creating the Light Environment •
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Applying the Light Environment •
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Dominant light Character Shadowing
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In Conclusion • Combine relevant
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Topics p Daniel Wright • Gore tec
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Screen Space Ambient Occlusion RRev
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Screen Space Ambient Occlusion RRev
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Baseline • 720p, 16 occlusion sam
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• Motivation Screen Space Ambient
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• Reduce neighbor samples Occlusi
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• Downsized render target - AO is
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• Downsized render target Down sa
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Results
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Temporal Filter • Filter the occl
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Temporal Filter • Reverse Reproje
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Temporal Filter • Reverse Reproje
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• Static objects Last Frame Tempo
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• Newly Unoccluded pixels New Pix
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Without Temporal Filter
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Temporal Filter • Doesn’t help
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Temporal Filter Gotchas • Accurat
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Computation Masking • Pixels with
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• Distant pixels Computation Mask
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In Conclusion • Use Reverse Repro
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Rendering Techniques in Gears of War 2 - Unreal Engine

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