Blurry HDRI

[glorybound]

I am trying to use a hi-res hdri, but it is really blurry. What am I doing wrong? I am using a Dosch HDRI, is the HDRI the problem?

[vlado]

What is the resolution of the hdri image? Are you using it as a spherical environment?

Best regards,
Vlado

[glorybound]

HDRI

It is a 2048 x 1024 Spherical Map

[vlado]

Well, if you think about it, for a camera with 90 degrees horizontal FOV, when the 2048 pixels are stretched around the scene, only 1/4 of them (512) pixels will be visible to the camera. So if you are rendering at more than 512 x resolution, it will look blurry. A solution would be to use a higher resolution HDRI or a "screen" background.

Best regards,
Vlado

[DaForce]

You are trying to use....?? how?

Have you got it in the max environment slot, or are you using it on a vraydome light?

And whats blurry the light from the HDR or the actual HDR shown in the render background for instance?

[joconnell]

Back to my thread in this post again as vlado is mentioning, only a portion of your map is visible to camera so you'd be better of using a planar map as a backgroud either as a comped bg or as an environment map with a gi and reflect refract override.

[glyph]

it occurred to me that it might be useful to have a horizontal tiling option (integer values only) for hdri - I know that would be way wrong but since its a tiling texture it might be useful for an interior hdri that does not have an obvious main light - correct me if its a stupid idea!

[percydaman]

well if its a 360 spherical image, tiling it wont work real well. Its... a spherical...

[glyph]

yeah but isnt the "spherical" just a mapping - it must have an edge somewhere and the top of the sphere would have the same polar distortions

I know tiling it would squash the reflections etc but as an illumination source it would double the resolution - sorry glorybound, in danger of hijacking the thread here

[Clifton Santiago]

I wouldn't necessarily consider 2048 px wide for an equirectangular panorama to be high res.

The highest res commericially available HDRI's I'm aware of are here:

http://www.sachform.de/webshop/produ...c8ededa6b7f4bd

They are 8000 px and sometimes they are not high enough res to be used for backgrounds (depending on the size of the image I am rendering).

[olitech]

Actually check these out...10,000 x 5000 pixels!
http://www.hyperfocaldesign.com/hype...dri-skies.html

They're pretty killer...

[Clifton Santiago]

Hey, nice. Thanks

[instinct]

we stitch our own at 30k+ :P we bought some hyperfocal ones, and am not really satisfied with the dynamic range they give to be honest. Plus they are Big, but not really sharp...could as well be 8k upscaled And given that there's no bundles and each "High Res" HDR is 60 bucks i was rather disappointed.

Regards,
Thorsten

[re:FORM]

we stitch our own at 30k+ :P we bought some hyperfocal ones, and am not really satisfied with the dynamic range they give to be honest. Plus they are Big, but not really sharp...could as well be 8k upscaled And given that there's no bundles and each "High Res" HDR is 60 bucks i was rather disappointed.

Regards,
Thorsten

Dispite the low dynamic range, are these worth looking at for background and reflection maps?

[PIXELBOX_SRO]

i love how the hdris look on the suurland s site