Real Shading in Unreal Engine 4 - Self Shadow

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$Background: Physics and Math of Shading - Self Shadow$

Pre-filtered environment map• 1 st sum stored <strong>in</strong> cubemap mips– Pre-filter for specific roughness’s– Fixed distribution, assume n = v– Loses stretched highlights1NNk=1L i l k≈ Cubemap. Sample(r, mip)
Environment BRDF• 2 nd sum stored <strong>in</strong> 2D lookup texture (LUT)Roughness1NNk=1f(l k , v) cos θ lkp(l k , v)cos θ v= LUT. r ∗ F 0 + LUT. g
Page 1 and 2: Real Shading in Unreal Engine 4Bria
Page 3 and 4: Overview• Shading model• Materi
Page 5 and 6: • LambertDiffuse BRDF- Saw little
Page 7 and 8: Specular distribution• Trowbridge
Page 9 and 10: Fresnel• Schlick- Approximate the
Page 11: Image-based lighting : Solution•
Page 15 and 16: Split sum approximation
Page 17 and 18: Importance-sampled referenceSplit s
Page 19 and 20: Material model• BaseColor- Single
Page 21 and 22: • TODO:anotherimageMaterial layer
Page 23 and 24: Material layering
Page 25 and 26: 4PERSPEKTYWAKRAJOWA• Bezpieczeńs
Page 27 and 28: Area Lights
Page 29 and 30: Specular D modification• Widen sp
Page 31 and 32: Representative point• Pick one re
Page 33 and 34: Sphere light energy conservation•
Page 35 and 36: Representative point applied to Tub
Page 37: Thanks• Epic- Rendering team- All

Real Shading in Unreal Engine 4 - Self Shadow

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