View Full Version : HDRI Image blurry

07-29-2018, 04:08 AM
Hi I've been trying out a few HDRI samples from VizPeople and whatever size I use the clouds appear blurry in my scene. It doesn't matter if I use one of their 6000x2900 or full-size 20000x10000 samples - there is absolutely no difference in quality. Both look "ok" but no more than that. Yet in Photoshop the images are super crystal clear. I've looked around to see if there is a "blur background" setting that might be checked within Layout but can't find anything like that (other than in Surface Editor for each object and they're all set at 0% anyway).

If I map the same image onto a curved polygon covering the camera angle the image is as sharp as I would expect.

Am I doing something wrong here? No point me buying a full size image if they're not going to do the job.

07-30-2018, 04:37 AM
Blurry in the scene in what context? Do they appear blurry in the reflections or in the environment background? What Lightwave version? First thing i'd suggest is disabling MIP mapping for the images in the image editor, in case that's softening them too much? Also does the camera have DOF enabled, as if the camera is out of focus, it's never going to look sharp?

07-30-2018, 12:28 PM
The image in the background looks blurry. The camera has no DOF applied (and doesn't matter which camera type I use) and turning Maximum Mipmap quality from High to Off makes no difference. Mipmad mode is either Antialiasing or softness and again makes no difference.

07-30-2018, 01:41 PM
If you make a clean new scene, put the hdr in the bg, does it still do it?

07-30-2018, 03:30 PM
Are you talking about how it looks in viewports, render or both.. ? OpenGL textures have limit how big single texture can be, usually to 2^n x 2^n pixels, where n>=1.. So no matter if you use 20k x 20k, in OpenGL it's still 4096 x 4096, the most likely..
If you use 4096 pixels wide image / 2*PI = 652 pixels / 360 degrees = 1.8 pixels/degree.
For 1024 it's 7.24 pixels/degree.

If you will press 'd', to open Preferences window, in GL tab there is drop-down list "OpenGL textures" with default 1024x1024 texture size. Did you try to increase it to see whether it'll fix your issue.. ?

08-01-2018, 03:35 AM
It's when I render the scene the texture looks blurry. As it happens I had my texture resolution set to the maximum 4096x4096 but that's neither here nor there. Yes the hdr image looks exactly the same in an empty scene or my project scene, so I'm assuming it's just not big enough to look crystal clear as it does in Photoshop or Lightwave itself is blurring it. As I say though, if I use a 6000x2900 image or a 20000x10000 image, the look is exactly the same. For an animation I guess it would be acceptable but for a still image, not so much.

08-01-2018, 04:38 AM
Can't debug from imagination. Good luck.

08-01-2018, 08:37 AM
cant see what your issue is.. tried here, and it works fine. (see screenshot, using a free hdri from tischbein3)142414

08-01-2018, 08:43 AM
I'll give it a go in LW2018 and see if there is a difference.