Real Shading in Unreal Engine 4 - Self Shadow

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

Sphere lights• Irradiance identical to point light– If sphere above horizon• Closest point between ray and sphere– Approximates smallest angle
Sphere light energy conservation• Specular distribution has been widened by light’s solid angle– We already have an approximation for this using “Specular D modification”– Only use normalization term– Divide out original normalization, multiply in new
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 and 12: Image-based lighting : Solution•
Page 13 and 14: Environment BRDF• 2 nd sum stored
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: Representative point• Pick one re
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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