Of the Tomb Raider, creating richer, deeper, more accurate ambient occlusion shadows that further bolster the visual fidelity of the game's fantastic graphics. The latest iteration of HBAO+ is found in We improved upon every aspect of HBAO to create HBAO+, and now in The result is a technique that is better and faster than Horizon Based Ambient Occlusion (HBAO), which we developed back in 2008. Microsoft built upon the ideas presented in the linked SAO paper to create BTAO, and worked with Crystal Dynamics to customize it for In Rise of the Tomb Raider, the Ambient Occlusion option enables players to choose between Microsoft and Crystal Dynamics' custom Screen Space Ambient Occlusion (SSAO) technique, called Broad Temporal Ambient Obscurance (BTAO), and our own HBAO+ and VXAO techniques.īTAO, seen originally in the Xbox One edition of the game and further tweaked for this PC release, is inspired by a 2012 AO technique called Scalable Ambient Obscurance (SAO). Scenes look flat and unrealistic, and objects appear as if they are floating. The AO technique used and the quality of the implementation affects the shadowing's accuracy, and whether new shadows are formed when the level of occlusion is low. Less accurate effects could be rendered in real-time, though they wouldn't appear anywhere near as dramatic or thrilling.Īmbient Occlusion (AO) adds contact shadows where two surfaces or objects meet, and where an object blocks light from reaching another nearby game element.
With this package highly realistic water effects and avalanches were created offline, recorded as Bink videos, and dynamically merged into real-time cutscenes to display visual effects that would be otherwise impossible to render.
Of the many additions, Crystal Dynamics' use of Side Effects' Houdini software is the most impressive. Physically Based Rendering gives materials a natural look under all conditions, HDR and adaptive tone mapping create stunningly bright zone transitions and highlights, deferred lighting with localized Global Illumination increases the realism of lighting, volumetric lighting adds God Rays and other shafts of light, dynamic color grading gives artists control over the appearance of individual areas, reactive water enables dynamic water ripples game-wide, physically correct forward lighting enables translucencies to be accurately lit, particle lighting enables particles to be dynamically lit by light from their surroundings, and Subsurface Scattering and Backscattering increases the quality of lighting on characters' skin. Crystal Dynamics' Foundation Engine returns for the sequel with upgrades galore.
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