I would like to use HDRI for my sky, but the HDRI has to be a specific location, specific city, specific height from ground. I mean real life location. Where can i obtain these HDRIs? Extract from Google Maps?
You would have to go to the location in the real world and take photos–HDRI is a high dynamic range format so that it contains more lighting information than a regular image and the only way to get that is to go and do a shoot to get the image.
If you’re just looking for a background, then you could maybe construct a 360 degree image from Google, but it’s not going to be HDRI