What kind of resolution is recommended for a first person game ? 512 or 1024? without any rendering problem?..with 4k I had a problem and I appeared streaming pool some like that
That really depends on the game and platform. If you’re talking about FPS games for console or PC, the standard nowadays is (for most games) 2048, since it provides a good compromise between graphics and performance for most of today’s hardware, though most games have video settings to use lower or higher-res textures as well. While 4k textures are used on quite a few games for ultra/max settings, (especially in big-budget AAA titles, like Battlefield or Wolfenstein), or included as free download packs, they’re quite large in size and use up a lot more resources for a fairly small contribution to graphical fidelity. For example, I have a stone brick texture (and these are uncompressed sizes), and at 2k resolution, the albedo texture is ~10MB. The 4k texture is almost 40MB. That’s an extreme example, but fairly accurate. People with 4k monitors are going to notice the difference the most, but the reason I said it’s a fairly small change is because the majority of people still use 1080p or 1440p monitors. Mobile FPS games, however, you can often get away with fairly low-res textures, such as 512 or 1024, due to the screen size of most mobile devices. I’ve seen a few use what look like 2k textures, but those games would have to be optimized quite well, and wouldn’t run on every device.
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Thank you very much for your help!! this answer is what I was looking for 
you are a genious… Now I’m calm, I’ll start with my project thanks
No problem! Happy to help Good luck with your project!