Friday, October 17, 2014

Why aiming for 60fps or full 1080p is a pointless goal.

So yet again on the web I've seen posts by journalists that 1080p is worthwhile, and that devs should be spending all their time trying to make full 1080p/60fps games, and yet again, it gets my back up...

A few year back I did a post about the mass market, which was an article I did way back in 2004 ( A new direction in gaming), and it seems to me this is the same thing, coming up again.  I mean, seriously, who do you want to buy your games, a handful of journalists, or millions of gamers?

Making a full 1080p/60fps game can be hard - depending on the game of course, but ask  professional devs just how much time and effort they spend making a game run at 60fps, while keeping the detail level up, and they'll tell you it's incredibly tricky. You end up leaving a lot of performance on the table because you can't let busy sections - explosions, multiplayer, or just a load of baddies appearing at the wrong time, slow down the game even a fraction, because everyone - no matter who they are, will notice a stutter in movement and gameplay. And that's the crux of the problem. Even a simple driving game, where it's all pretty much on rails, so you know poly counts and the like, has to leave a lot on the table, otherwise if there is a pileup, and there are more cars, particles and debris spread around that you thought there would be, the it'll all slow down, and will look utterly horrible.

Take a simple example. Your in a race with 5 other cars, cars are in single file, spread out over the track - as the devs expected it to be. Your in the lead with a clear track. So lets say the devs had accounted for this, and are using 90% of the machines power for most of the track, and on certain areas, they reduce this to account for more cars and effects - like the start line for example. But suddenly, you lose control, and spin, the car crashes and bits are spread everywhere along with lots of particles. Now the other cars catch up, hit you, and it gets messy. Suddenly, that 10% spare just wasn't enough. it needs a good 30-40% to account for particle mayhem, and damage, and the game slows down. As a gamer, its not dropped from 60 to 30 - or perhaps even lower depending on how many cars are in the race (like an F1 race for example). Now, 30fps isn't terrible, and even 20fps would be fine - probably, but the thing is....the player has experienced the 60fps responsiveness and now its suddenly not handling the same way, and they notice.

The problem is people notice change, even if they don't understand the technical effects or reasons behind it. So going from 60 to 30 will be noticed by everyone, even when you compensate for it. It is much harder to notice going from 30 to 20 when there is frame rate correction going on, but many can still "feel it".

So, if I'm saying you shouldn't do 60fps or full 1080p (if the game struggles to handle it), what should you do? Well, what people really notice, isn't smooth graphics, but smooth input. Games have to be responsive, and it's the lag on controls that everyone really notices. If you move left, and it takes a few frames for that to register - everyone cares, not just hard core gamers. But if a game responds smoothly, then if your at 60 or 30 - or even 20! then gamers are much more forgiving. This is mainly because once you're in the thick of the action, they are concentrating on the game, not the pretty graphics or effects. I can prove this too, even to hard core devs/gamers.  Years ago when projectors first came out they were made with reasonably low res LCD panels, and you got what was called the "Screen Door" effect. Pixels - when projected, didn't sit right next to each other, they were spaces between them. Now when you started a film, you'd see this and you would end up seeing nothing BUT the spaces. However as soon as you got into watching and more importantly, enjoying the film, that went away, you never saw the flaws in the display, because you were concentrating on the content.

The same is true of games, sure you power up a game and ooo...look, its super high res, and ever so smooth! But 10 minutes later, your deep in the game and couldn't give a crap about the extra pixels, or slightly smoother game, all you care about is the responsiveness of it all. If it moves when you tell it to, your happy.

So what about the 1080p aspect? Well years ago when 1080p started to become the norm, and shops had both 720p and 1080p large screen TVs in store, I happened to be in one, where they had the same model, but one 1080p, and on 720p hanging right next to each other, playing the same demo. I went right up to them, and could still hardly tell the difference. These were 2 50" displays, yet with my noise almost touching them, it was hard to tell where the extra pixels were. Now, if you have a 1080p projector, and are viewing on a 2-3 meter wide screen, I'm pretty sure you'll notice, but on a TV? when your running/driving at high speed - no chance. Every article about resolution in games shows stills, and this is the worst thing to use, as that's not how you play games. It's also worth remembering, that at that moment in time your noting playing, so your not concentrating on the game, your doing nothing but search for extra pixels, so it's yet another con really.

So whats the benefit to running slower, at a slightly reduced res? Well, 1080p at 30fps means you can draw at least twice as much. That's a LOT of extra graphics you can suddenly draw, and even if you don't need/want to draw that much more, if makes your coding life MUCH simpler. You no longer have to struggle to maintain the frame rate, or worry about when there is a sudden increase in particles or damage - or just more characters on screen.

What about resolution? Well 720p is still really high-res. There are still folk getting HD TV's and watching standard def TV thinking it's so much sharper than it used to be! The mass market usually doesn't "get" what higher res is until they see it side by side, and once things are moving and they are concentrating on other things, they will neither know, or care.

At 720p, 30fps you can draw over 4 times as much 1080p, 60fps. That's a LOT of extra time and drawing. Imagine how much more detailed you could make a scene with that amount of extra geometry or pixel throughput. Even at 3times, you could leave yourself a massive amount of spare bandwidth to handle effects and keep gameplay smooth.

2D games "probably" won't suffer too much from this problem, although on mobile web or consoles like the OUYA they will as the chips/tech themselves just isn't very quick.

So rather than spend all your time with tech and struggle to maintain a frame rate most gamers won't notice, shouldn't you spend all your time making a great game instead? If you're depending on pretty pixels to make your game enjoyable, it probably isn't a great game to start with, and you should really fix that.

Games with pretty pixels sell a few copies, truly great games sell far more, and while it's true that games with both will sell even more, the first rule of game development is that only games you release will sell anything at all, and while playing with tech is great fun, constant playing/tuning doesn't ship the game.









6 comments:

Anonymous said...

In theory this problem could be handled in the engine. Except for games using VR-glasses. The lag issue becomes noticeable during actions that pan the view.

However, actions that pan the view (if talking 3D), especially if done by player with say a mouse, tend to be rather quick. So the higher the mouse x-delta the less fancy effects the player is going to notice.

In VR-glasses of course since the view pans with your head *and* you/your head turns quite slowly compared to using mouse, noticing that would be easy. That could be solved by specification - if using glasses, then you need more beefy system to maintain certain fps.

Shane Skekel said...

I have to agree with you on this. Aside from individual screenshots, I don't see how having a resolution of 1280*720 or 1920*1080 somehow makes games, movies, etc. better. A bad case of technical advancements and greater resources being a hobble. Personally, It's better to have a game that runs at 256*244 that's enjoyable over trying to have Full Hi-Def and peak framerate only to end up with a shoddy product. Oh, and I grew up playing the original Lemmings on my Amiga decades ago and still have the CD-ROM DOS version.

Anonymous said...

Im worried when the head of a software company would even state that 60 fps 1080 is a bad idea.

Gamemaker can easily preform 1080dp 60fps even with large textures and multible things going on, with the right knowledge of simply unloading and loading memory. Gamemaker is not a childrens toy anymore - there are serious programmers who understand how to program this.

That first 10minutes of a game are whether or not a lets player will stream a game. Or whether or not he/she will put a pic as there wallpaper. Its the reddit post or the Gif posted. 60fps 1080 is the most profitable. thing imaginable

If Im competing against Multimedia fusion, unity and the rest and they allow and encourage those conditions, that games are ranked by - gamemaker will be left in the dust.

- Valkyrie

Anonymous said...

if anything mike your recent changes your team has done to gamemaker have been benificial to helping me archieve those benchmarks.

Ive been able to create open world games that are reaching 70,000 pixel longs textures simply by loading and unloading dater as chunks with no problem at all.


- Valkyrie

Mike said...

I didn't say it wasn't possible, I said it was a pointless goal as only seriously "hard core" gamer - which includes journalists - notice. The public as a whole can't tell the difference between 30/60Hz, or 720p/1080p.

So what percentage of people playing your games are hard core? If it's most - then it's worth doing, if it's like most other games and only a small fraction, then it's a pointless waste of time, money and resources.

Shane Skekel said...

Mr. Dailly,
Have you looked into resolution/aspect ratio independence? (For example: Touhou Kishinjou - Double Dealing Character.) I think it would be something a game programmer such as yourself would look into.