mental ray Architectural and Design Visualization Shader Library

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14 2 Architectural MaterialAO looked up within a shorter radiusUsing a radius creates only a “localized” AO effect; only surfaces that are within the givenradius are actually considered occluders (which is also massively faster to render). Thepractical result is that the AO gives us nice “contact shadow” effects and makes small crevicesvisible.There are two ways to utilize the built in AO in the mia material:• “Traditional” AO for adding an omnipresent ambient light that is then attenuated bythe AO to create details.• Use AO for detail enhancement together with existing indirect lighting methods (suchas Final Gathering or photons).The latter method is especially interesting when using a highly “smoothed” indirectillumination solution (i.e. a very high photon radius, or an extremely low final gather density)which could otherwise lose small details. By applying the AO with short rays these detailscan be brought back.
2.3 Features 152.3.7 Performance FeaturesFinally the mia material contains a large set of built in functions for top performance,including but not limited to:• Advanced importance sampling with ray rejection thresholds• Adaptive glossy sample count• Interpolated glossy reflection/refraction with detail enhancements• Ultra fast emulated glossy reflections (refl hl only mode)• Possibility to ignore internal reflections for glass objects• Allowing a choice between traditional transparent shadows (suitable for e.g. a windowpane) and refractive caustics (suitable for solid glass objects) on a per material basis.
Page 1 and 2: mental ray Architectural and Design
Page 3 and 4: Table of Contents1 Introduction 11.
Page 5: Table of Contentsix3.8.3 Examples .
Page 9 and 10: Chapter 2Architectural Material2.1
Page 11 and 12: 2.2 Fundamentals 52.2.1.1 A Note on
Page 13 and 14: 2.3 Features 7Hence, when using GI:
Page 15 and 16: 2.3 Features 9The rules are as foll
Page 17 and 18: 2.3 Features 11In the real world
Page 19: 2.3 Features 13Used alone, an AO sh
Page 23 and 24: 2.4 Quick Guide to the Material Par
Page 25 and 26: 2.5 Detailed Description of Materia
Page 55 and 56: 2.6 Tips and Tricks 49• For extre
Page 57 and 58: 2.6 Tips and Tricks 51Diagram for g
Page 59 and 60: 2.6 Tips and Tricks 53There is one
Page 61 and 62: 2.6 Tips and Tricks 55• Glass-Liq
Page 63 and 64: 2.6 Tips and Tricks 57Enjoy the tro
Page 65 and 66: 2.6 Tips and Tricks 59Many small ad
Page 67 and 68: Chapter 3Sun and Sky3.1 Introductio
Page 69 and 70: 3.4 Common Parameters 633.3 Importa
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3.5 Sun Parameters 65• saturation
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3.6 Sky Parameters 67light"sun",# T
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3.6 Sky Parameters 69• sun direct
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3.8 Sky- and Environment Portals 71
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3.9 Photometric Lights 833.9 Photom
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3.9 Photometric Lights 85• When i
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88 4 Camera- and Exposure EffectsAl
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90 4 Camera- and Exposure Effects4.
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92 4 Camera- and Exposure Effects1,
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94 4 Camera- and Exposure EffectsTh
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96 4 Camera- and Exposure Effectscr
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98 4 Camera- and Exposure EffectsEv
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100 4 Camera- and Exposure EffectsS
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Chapter 5General Utility Shaders5.1
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5.2 Environment Blur 105replaced by
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5.2 Environment Blur 107But what is
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5.2 Environment Blur 109Glossiness
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5.3 Light Surface 111An example of
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5.3 Light Surface 113the other two
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5.3 Light Surface 115Complex geomet
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5.3 Light Surface 117Another exampl
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