The same thing happened to me. I watched the photos and they caught my eye, being a new IdeaPocket girl. But when I saw the trailer, I was pissed off: plastic boobs, and very badly done. Before at least they tried to disguise them, now they are like tennis balls stuck inside the tits.
I don't know if it's the first time with IdeaPocket, but this reinforces what I'm saying that the disgusting fake boobs are slowly infiltrating all the studios, and soon this will be like western porn, full of plastic dolls...
If JAV was outstanding for something, is because their actresses were real, women or girls that you could meet in the street, and you didn't realize it. Now many aspire to be American pornstars, women full of silicone and botox who visit the cosmetic surgeon every three months.
Now that they have already introduced the disgusting plastic boobs, next will be tattoos and piercings, you'll see...
This "american" chick has FOUR VR movies coming up in the next few days....
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I abandoned western porn because of this, and I see JAV is following the same path. I'm getting depressed...
I do notice improvement in the 8K version, although as you say, IP VR movies, along with S1 and some Moodyz movies, are the most mediocre.
With the Quests you can't do much, because even if you connect them to a PC and apply supersampling, the image is compressed to 4K to send it to the glasses, as there is no direct image, so you lose any enhancement provided by the PC.
I use HP Reverb G2, which have direct image via DisplayPort, so there is no need to compress the video. With my RTX 4070Ti Super card I can apply 200% supersampling and 200% antialising with MSAA filter. Basically I'm playing the movie at 16K and by downsampling it to the 4K resolution of my glasses, all the aliasing is removed and you get maximum definition.
With some titles the quality is incredible, just like in real life. But since I'm pushing the video to the max, all the bitrate limitations come to light. That's why I complain so much about this issue. Sampling at 16K, the lower the bitrate, the blurrier the video becomes at a shorter distance.
With the 100 Mbps of A Festa it looks AMAZING, maximum definition even at 4 or 5 meters distance. Like watching without a headset. Unfortunately A Festa has reduced the bitrate to 80 Mbps in its latest titles, and I notice it...
But with IP VR or S1 or Moodyz 8K movies, which have a pathetic 12-15 Mbps bitrate, the image already starts to blur at less than a meter.
As I say, I do notice quite a difference between the 8K and 4K versions, to the point that I no longer download anything in 4K. If no one uploads the 8K version, I forget the movie. But in your case, even if you don't notice much difference with the Quest, for collecting and archiving purposes you should download the 8K version, because in the future the headset screens will have more resolution, and then it will be more noticeable.
This is what has happened with 2K movies. With the low resolution screens of mobiles used for VR in 2017, or the first VR headsets, they looked acceptable. But now with the headsets with 4K screens we have, they look terrible. The same will happen with 4K movies, so download the 8K version even if you don't notice much difference now...