Bạn đang xem: Ambient occlusion là gì
Đang xem: Ambient occlusion là gì
As far as I’m concerned, it is a setting that really fleshes out a gaming scene. But what is ambient occlusion, other than some graphical setting in the menu?
To break it down as simply as possible, let us look at the term occlusion, which generally would mean (in graphics), the amount of something or some element concerning lighting in the scene.
Combine this inkhổng lồ ambient occlusion, it illuminates all of the different assets within the cấp độ or scene based on other geometric assets, (i.e. character lighting being darker because the table in the scene is receiving more light within the scene).
Aspects of a màn chơi where you would not see light normally will appear darker than those aspects of a level in which light is touching.
Related: trò chơi Designer Education 101
‘But Can It Run Crysis?’
In 2007, Crysis became one of the first games to lớn include ambient occlusion. It was subsequently praised for its impressive sầu graphics and lighting, leading to lớn ambient occlusion being the watermark in which game lighting is usually modified. It even spawned a meme, ‘But can it run Crysis?’ stemming from graphics card Review.
As good as they may be, people would spout ‘…but can it run Crysis?’ Years later, I can now run Crysis on my máy vi tính. Oh, how times have changed.
For those gamers out there who love to be immersed in a game’s visuals, (who doesn’t?!), ambient occlusion is a subtle, yet effective sầu way of really making a màn chơi or scene come to lớn life & seem more realistic.
Ambient Occlusion When Enabled
In a game like ROME 2 Total War, the ambient occlusion plays a large role. You are controlling hundreds upon hundreds of warriors, marching, and battling their way across the ancient world. To really give them a realistic chất lượng, ambient occlusion being toggled ‘on’ can really make it look lượt thích a blockbuster film, à la Gladiator or any other ancient war film.
It isn’t always about the bigger picture. Subtle aspects of ambient occlusion, lượt thích making an office scene seem more real, rather than a flat portrait, is a great way to make it seem real. Desks, chairs, và computers all have ambient shadows, making you believe sầu that this could be a reallocation.
Different Types of Ambient Occlusion
Unsurprisingly, not all games could keep up with Crysis at the time in terms of visuals, & there are different types of ambient occlusions for different visual styles. There are a slew of different types và tweaked versions of true ambient occlusion. The main ones are SSAO, HBAO, HDAO & VXAO.
SSAO: Meaning, Pros và Cons
Instead of using shapes to determine the space between lighting, screen space ambient occlusion utilizes sleight of h&, specifically pixel depth to give the impression of lighting changes. Screen space ambient occlusion is a great method in which lớn develop certain games, & especially great when running a game on perhaps an older PC, or one with low CPU power.
SSAO does not use any CPU lớn work, which provides the gamer with a solid amount of visual eye candy for 1/4th of the output.
Something that might appeal to lớn game designers is that SSAO has no load times, making their game run smoother. If your game is simpler than Crysis, (và it probably is), SSAO is a totally viable & smoother counterpart to normal, full-fledged ambient occlusion.
Of course, the drawbachồng of using SSAO is that you aren’t exactly getting the entire graphical power that you would normally get. It deals with what you can actively see at one time in the game; basically, giving you tunnel vision.
However, if you are willing to sacrifice punishingly high visuals so you can run a PC, or you vày not really mind this concept of just seeing the graphical ability scene by scene rather than the full picture, then SSAO is probably your best bet.
HBAO & HDAO
We now know what SSAO stands for, but what is HBAO? HBAO stands for ‘horizon based ambient occlusion’. It is a step up graphically from the simpler screen space ambient occlusion. It ups the ante from every aspect in SSAO, giving the game better và higher definition, và visibility.
It renders in full resolution the different samples of normally darkened areas, adding an extra, subtle visual punch lớn your game.
At first, I thought that HBAO was simply a step up from SSAO. However, upon looking at screenshots of Battlefield 3, I noticed that HBAO really changes the look. Shadows appear subtly in places I did not even think to look before. Nooks & crannies, plants, corners—all of them were shadowed và made the game look grittier, darker, and most importantly, more realistic.
This option of ambient occlusion is for more heavy-duty systems. If you are willing khổng lồ have sầu your system take a hit then HBAO is a pretty solid option that blends good aspects of ambient occlusion & running speed.
Now, this is the heaviest of hitters in terms of ambient occlusion unique. VXAO or better known fully as voxel accelerated ambient occlusion. This is the pinnacle of advanced ambient occlusion. This will tax your rig to lớn the limit.
However, it will give sầu you the absolute full experience. It isn’t that widespread yet, being used a few times in newer releases like Rise of the Tomb Raider.
The use of this highly advanced size of ambient occlusion, of course, depends on the type of game you are playing. Although some first-person shooters lượt thích the newer Wolfenstein games would no doubt look great with VXAO implemented, however, other games may be a better fit for it.
I am thinking about RPGs, action-adventure titles, (lượt thích the above-stated Rise of the Tomb Raider), would be better. The environments look lượt thích real places, the objects have sầu a new life to lớn them. The sky’s the limit with VXOA, & it is still in its infancy in the grvà scheme of things. I am truly excited to see what it as lớn offer gaming as a whole.
Should You Use Ambient Occlusion?
Pros, Cons, & Verdict
Okay, so it comes down to lớn this. After poring over the different methods, types, pros, và cons, I believe sầu that you should definitely give ambient occlusion a shot. It can really add lớn a scene in a game, & there are enough different types and tweaked versions for you to lớn best display a game without sacrificing your hardware that you are running it on.
Let’s các mục our options here:
1: SSAO – Screen Space Ambient Occlusion
This is the ‘lowest’ value in terms of ambient occlusion. This will give you the bare minimum while still including aspects of ambient occlusion. It is easier on older systems or older graphics cards. Graphically impressive sầu games, especially newer ones, may suffer in chất lượng with this option.
However, if you bởi vì not emphaform size that with your gaming, this is probably your best bet. In short: It works well, sacrificing graphical quality while still looking good on older PCs.
2: HBAO & HDBA – Horizon Based Ambient Occlusion
This is the ‘middle’ or intermediate option with ambient occlusion. It is a significant step up from SSAO, fleshing out the environment more & giving more value khổng lồ a different object in the game. Although this is the middle option, it does push some PCs khổng lồ their limit.
I would recommover this option for those who can run some higher graphical power on their PCs. You need to find a balance between computer performance and graphical output. This is the one where it might be a crapshoot if you aren’t sure about graphics.
‘Can You Run It’
A convenient way to get a feel for what your computer can run is by visiting ‘Can You Run It’. On this trusty site, you simply allow the site khổng lồ monitor your system, acquiring all the pertinent info. You then use the drop-down menu khổng lồ enter a game that you are interested in running. After clicking ‘can you run it’, it will tell you if you can run it, and if you can, how well.
It will danh sách a bunch of helpful features lượt thích your CPU power in comparison to lớn the minimum requirements và more. This has given me a good idea of how capable my PC was before purchasing games on Steam and hasn’t failed me yet!
3: VXAO — Voxel Accelerated Ambient Occlusion
This is the cream of the crop when it comes lớn ambient occlusion. It demands a lot of a gaming system but looks absolutely stunning.
If you can somehow find a way lớn run this version of ambient occlusion properly và quickly, this will no doubt give you the best graphical experience possible in gaming so far. Maybe in 10 years, we will be talking about VXAO the same way we talk about SSAO or HBAO.
But for now, this is the undisputed king of ambient occlusion. You will take a huge hit in graphical power, but the payoff could be revolutionary.
The pros & cons really have more lớn bởi vì with the machine that it is or will be running on. It is up khổng lồ you, however.
You may have a graphics thẻ & updated PC where you can run ambient occlusion in all of its glory. Or you might be gaming on an older laptop và need to lớn implement SSAO so you can smoothly run it without really sacrificing too much in terms of visuals.
Let’s run through it one more time.
What is ambient occlusion quality? The different qualities and aspects are SSAO, HBAO, HDAO, and VXAO. They each serve sầu an important purpose visually và each has its own pros & cons, depending on who is looking khổng lồ use them.
Don’t be too quiông chồng lớn commit to lớn one, however, vày your retìm kiếm và look around & determine what is important lớn you graphically. Me, I am a simple user of SSAO. I personally emphaform size story and gameplay over visuals, but that is just my personal gaming opinion. What is yours?