What is HBAO and SSAO in games

Ishank · Mar 30, 2011, 04:57 PM

Hi guys.I just want to know that what is HBAO in games like bad company 2 and SSAO in games like HAWX 2. Are they put serious load on GPU ?

**MIG-31** · Mar 30, 2011, 05:34 PM

HBAO Horizon-Based Ambient Occlusion

SSAO: Screen Space Ambient Occlusion

Sihastru · Mar 30, 2011, 05:49 PM

HBAO stands for Image-Space Horizon-Based Ambient Occlusion
SSAO stands for Screen-Space Ambient Occlusion

HBAO is an improved method of AO compared to SSAO. AO is a "trick" that will accentuate the perception of depth for the objects rendered in a scene by applying a shadow effect in key areas on the object itself and on the immediate surrounding area. It looks at the geometry and also at the way bump-mapping is applied to flat textured surfaces.

As a side note, bump-mapping is also used by the tessellation process in a similar manner. In a way, Ambient Occlusion is the poor man's Tessellation since it doesn't require a DX11 card and the performance cost is very small by comparison.

Ishank · Mar 30, 2011, 06:26 PM

Thanks guys !

Mar 30, 2011, 04:57 PM	#1
Ishank HardwareHeaven Addict Join Date: Dec 2010 Location: Sitapur,UP,India Posts: 277 Rep Power: 42 System Specs	What is HBAO and SSAO in games Hi guys.I just want to know that what is HBAO in games like bad company 2 and SSAO in games like HAWX 2. Are they put serious load on GPU ?

Mar 30, 2011, 05:34 PM	#2
MIG-31 HardwareHeaven News Mod Join Date: Dec 2002 Location: Nottingham,UK Posts: 56,818 Rep Power: 471 System Specs	Re: What is HBAO and SSAO in games HBAO Horizon-Based Ambient Occlusion SSAO: Screen Space Ambient Occlusion __________________ Please Post Your News Submissions Here

Mar 30, 2011, 05:49 PM	#3
Sihastru Never been clicked Join Date: Dec 2009 Posts: 433 Rep Power: 45 System Specs	Re: What is HBAO and SSAO in games HBAO stands for Image-Space Horizon-Based Ambient Occlusion SSAO stands for Screen-Space Ambient Occlusion HBAO is an improved method of AO compared to SSAO. AO is a "trick" that will accentuate the perception of depth for the objects rendered in a scene by applying a shadow effect in key areas on the object itself and on the immediate surrounding area. It looks at the geometry and also at the way bump-mapping is applied to flat textured surfaces. As a side note, bump-mapping is also used by the tessellation process in a similar manner. In a way, Ambient Occlusion is the poor man's Tessellation since it doesn't require a DX11 card and the performance cost is very small by comparison. __________________ There are more things in heaven and earth then are dreamt of in your philosophy. Intel Core i7 3820 \| Corsair H80 \| Asus P9X79 \| Kingston HyperX T1 Black 32GB DDR3 \| Gigabyte 8800 GTS 512 \| 2xIntel X25-M 160GB RAID0 + 2xWD 1TB Green RAID1 \| Asus Xonar DX \| Asus ES2-750 \| Sony OptiArc DVD+/-RW \| Corsair AX850 Gold \| Fractal Design Define R3 Titanium \| Dell 3007WFP-HC2 30" 2560x1600 \| Corsair SP2500 \| Logitech UltraX Premium \| CM Storm Advance \| Microsoft Windows 7 Professional 64bit

Mar 30, 2011, 06:26 PM	Thread Starter #4
Ishank HardwareHeaven Addict Join Date: Dec 2010 Location: Sitapur,UP,India Posts: 277 Rep Power: 42 System Specs	Re: What is HBAO and SSAO in games Thanks guys !