Environment HDRI: Mirrorball, Equiretangle, or...

Hi,

Here are two types of Environment HRDI probe, but what types are they, and can you show examples of other types?


The second looks about right using equirectangular in Cycles, but then again, so does the first, sort of… Yet both look wrong when set as mirrorball.

This is the type of image I find classed as a mirrorball: http://www.google.co.uk/imgres?q=mirrorball+hdri&hl=en&client=firefox-a&hs=mRm&sa=X&tbo=d&rls=org.mozilla:en-US:unofficial&biw=1920&bih=860&tbm=isch&tbnid=txacvYXvVfr6vM:&imgrefurl=http://commerce.vismasters.com/catalog/products/hyperfocal-hdri-environments_4407.aspx%3Fproduct%3D4407%26view_selection%3DFeatures&docid=V7tO3dkFCRrIeM&imgurl=http://commerce.vismasters.com/redir/images/%3Fimagetype%3Dfeatures%26image%3Dsku1014-1146/hdri_01.jpg&w=585&h=296&ei=6iYiUbz1O4WttAbqq4HgAw&zoom=1&ved=1t:3588,r:47,s:0,i:232&iact=rc&dur=799&sig=116542717789289132396&page=2&tbnh=160&tbnw=311&start=32&ndsp=38&tx=130&ty=96

This the Wiki entry for Equirectangular, http://en.wikipedia.org/wiki/Equirectangular_projection

So, are both my examples wrong? (The first being somewhat equirectangular?)

For completeness here’s a few links I found whilst searching BA
http://www.openexr.com/http://www.debevec.org/Probes/http://forums.cgsociety.org/archive/…p/t-76646.html

Hi, here is an equirectangular picture:

http://www.google.de/imgres?imgurl=http://wiki.panotools.org/images/0/01/Big_ben_equirectangular.jpg&imgrefurl=http://wiki.panotools.org/Equirectangular_Projection&h=300&w=600&sz=44&tbnid=CnypkJbjLY8ZgM:&tbnh=60&tbnw=120&prev=/search%3Fq%3Dequirectangular%26tbm%3Disch%26tbo%3Du&zoom=1&q=equirectangular&usg=__1Ky7x7Pks6VoAu5og4DKn0pljVY=&docid=iLVFcjqSVZ6jyM&hl=de&sa=X&ei=RC4iUZLREdDHswbMuoDoDw&sqi=2&ved=0CEQQ9QEwBA&dur=500

The second is mirror ball.
Should match perfectly in cycles.

Cheers, mib.

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Wouldn’t it need to be “stretched” out first?

No, you have to switch to mirror ball in world Environment settings.

Cheers.

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Right, its the image, I was always rendering towards the vertical edge, when I rotated 180 it was fine… Cheers :wink: