enter image description hereI just loaded in a HDR image using the node editor using the Environment Text and it renders well the mountains in the distance look good but then the bottom of the image is twisted in a circular pattern all smeared together. My image is 3000X1970 and I am using the default camera. I am using cycles render. I have looked at every setting I can think of to correct this but nothing. I did try to find the answers online before I asked here but I guess I am not typing in the right search questions.

Is my image the wrong size? I am not sure what I am doing wrong. Thanks Blender 2.79

Here is the image that was requested. This in another image I downloaded which is a Panoramic HDR and this was even worse than my first image. Thanks again.

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    $\begingroup$ Some spherical images have naturally poorer quality at the poles where they get more warped simply because of limitations on the capturing method. It may be unrelated to Blender settings. Also 3000x1970 for a spherical image is admittedly poor $\endgroup$ – Duarte Farrajota Ramos Feb 14 '18 at 19:53
  • $\begingroup$ This image looks nothing like others I have seen even the distant mountains are somewhat distorted. What is the best size HDR for Blender? This one is just not working well. Thanks for your comment. $\endgroup$ – Allen Feb 14 '18 at 19:57
  • $\begingroup$ Please use the edit link at the bottom of your question (i.stack.imgur.com/lXFuK.png) and add images that exemplify the issue and also show your current mapping settings and the original HDR $\endgroup$ – cegaton Feb 14 '18 at 20:17
  • $\begingroup$ "What is the best size HDR for Blender?" There is no "best size". Smaller images consume less memory, larger ones have better quality, choose your balance wisely. There are environments maps that go above 16000px wide $\endgroup$ – Duarte Farrajota Ramos Feb 14 '18 at 20:24
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    $\begingroup$ The fact that the image is curved in the viewport suggest to me that this is not a properly formed equirectangular image nor a mirror ball. Try another image from cloud.blender.org/p/hdri $\endgroup$ – Mike Pan Feb 15 '18 at 2:17

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