I have a Sony 3DTV (46HX903) though it wasn't bought
for 3D, it's 3D capable and after paying for the TV, it was a relatively inexpensive upgrade to add the glasses & transmitter. (actually I bought a 3D kit with the TV, and after selling the parts I didn't want/need, it actually lowered the cost of the TV)
I really do think that playing in 3D adds a lot to the game. The sense of speed is better, elevation changes (something GT has always been great at) are more apparent, I feel that I can judge distances better - I'm far less likely to go into the back of another car, find it easier to judge whether or not I can fit through a gap when overtaking, can hit the apex of a turn better.
It also lets me better appreciate the work that went into the car models in the game. Small details that you might have overlooked in 2D stand out in 3D.(the fact that lots of rivets,bolts etc are actual 3D models rather than painted-on textures) Rather than just being a static 2D image, when you watch it in 3D it's like you're looking at a model car and you realise just how much work went into it.
That's not to say that it's perfect though. The framerate takes quite a hit at times, though I can't say it's ever felt like it's been down as low as 20fps. I'd say on average it's more like you're playing a 30fps racer than a 60fps one in 3D, and when you're playing in 3D, framerates seem like less of an issue. I can't really explain why that is. Aliasing can get pretty bad in 3D though. ('jaggies')
The biggest issue with 3D right now though, and this applies to all displays, is crosstalk. The greater the depth is with 3D, the more of it you get, and crosstalk is basically ghost images of what one eye should see in the other. How you set up the game (there are a couple of settings for 3D) determines how much of it there is, and after a while with 3D you do stop noticing it most of the time. You learn to just focus on the 3D image and mostly ignore the crosstalk. Some 3DTVs are better for it than others, but they all suffer from it to some degree. (Panasonic's plasmas have the least crosstalk right now, but are not really suited to gaming in my opinion)
It's so bad with the in-car view that it's basically unplayable in 3D for me though. (but I never use it anyway) The other views aren't too bad, but for some reason the in-car view is just awful.
If anyone is playing in 3D, I would recommend changing from the default settings as well. Turning up parallax to 10 maximises the amount of depth (though I would use lower numbers if you use in-car view) and somewhere between 70-85 seems best for convergence depending on the view you use. I have settled on 85 for now, which will put the convergence point right on the back of the car in the exterior view which seems best, and keeps almost all the depth inside the screen rather than having things pop out at you. (though particles like dirt/smoke/grass getting kicked up do sometimes come out of the screen a bit) I really hope that polyphony add the ability to change the parallax & convergence settings from the pause menu in a future update rather than having to quit out to the options screen.
I don't know that I would recommend someone rush out and buy a 3DTV just to play the game in 3D, and I've yet to see anything that convinces me that it's worthwhile to watch films/television in 3D but if you have a 3D capable screen, or are looking to buy a new TV and it's not much extra money to get a 3D capable set, I think it's definitely worthwhile for games.
The technology is certainly at an early stage right now. I do think it will become more prevalent in the next few years, and hopefully improve quite a bit as well. (I can't wait until 3D OLED displays are widely available and affordable)
I will say though, that it took me a while to get used to playing in 3D and it's not something that a quick 10 minute demo in a store is going to give a good impression of. (especially if the game is at the default settings with a low amount of depth and the convergence set far too low) I also don't play in 3D all the time - sometimes I just want a more laid back experience and don't bother with it, just like I will sometimes use the dual shock even though I have a DFGT wheel in here, and how I don't wear my prescrption glasses every waking minute.
I wonder if it was a waste of time to make GT5 in 3D cause they way I see, people really don't care about this feature at all, people won't be willing to spend the extra money for a new TV and set of glasses and not only that, I personally think Sony really forced PD to make GT5 in 3D and to be quite honest with you I think it made the game very bug due to have a 3D mode. am I the only one? I mean the time that they wasted making GT5 in 3D could have gone into making the standard cars better. I still think there is a major glitch with GT5 due to having 3D mode, the pixels on the cars are bad at times.
It's relatively trivial to add 3D to a game, especially if you just use a 'brute force' method and simply have the game render another viewpoint without making any other changes... which seems to be exactly what GT5 does. As far as I can tell, the graphics are basically the same in 3D (textures, car models etc. all kept the same) which suggests that it didn't take up too many resources to add to the game.
If they had spent a long time optimising the game for 3D to get it running near 60fps all the time, then it would be another matter. (and I personally think it would have been worth it if they did)
You dont need to wear glasses to see HD.
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I'm pretty sure the number of people needing vision correction is over 50% in most countries now. (I seem to recall reading numbers over 70% in some places) A large number of people
do need to wear glasses to see HD.
I can't say how good or bad other 3D glasses are, but I have no problem wearing the Sony ones for extended periods of time. They're big, but they're relatively light for their size, and the weight is distributed evenly which helps a lot.
It's much more noticeable going from wearing no glasses at all to wearing my prescription ones than it is going from wearing glasses to putting the 3D ones on top.