Author Topic: How easy is it to generate IBL HDRI?  (Read 1650 times)

Offline wtimmins

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How easy is it to generate IBL HDRI?
« on: September 17, 2015, 01:49:28 PM »
Is it nothing more than 'save as HDRI,' or does it require some arcane tweakery?

Offline TheBadger

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Re: How easy is it to generate IBL HDRI?
« Reply #1 on: September 17, 2015, 04:42:48 PM »


When a render finishes you then have the option to save. Just select .exr.
All done. no tweaking, twirking, or punching your PC needed.  :)
It has been eaten.

Offline wtimmins

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Re: How easy is it to generate IBL HDRI?
« Reply #2 on: September 17, 2015, 06:48:26 PM »
Oh excellent.

I've been trying to make IBL-quality HDRIs using other products and... yeeeeah. Three months of screaming and punching monitor.


Offline Tangled-Universe

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Re: How easy is it to generate IBL HDRI?
« Reply #3 on: September 17, 2015, 07:05:14 PM »
Another big plus of TG's EXR is that the HDR has a bigger dynamic range than most commercial photobased HDR's.

Offline Oshyan

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Re: How easy is it to generate IBL HDRI?
« Reply #4 on: September 17, 2015, 10:37:30 PM »
You probably want Spherical Camera output to use as an IBL. That too is easy to render out, but does require one of the Professional versions of Terragen 3 as the feature is not available in Terragen 3 Creative. As an alternative you can of course output multiple images and stitch them into whatever format of IBL source you need.

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Offline wtimmins

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Re: How easy is it to generate IBL HDRI?
« Reply #5 on: September 17, 2015, 11:58:58 PM »
That is very disappointing to find out. Also, reading more closely, terrain export and a few other things also seem limited to Professional.

Looks like I'll be giving this a pass, thanks anyway!

Offline paq

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Re: How easy is it to generate IBL HDRI?
« Reply #6 on: September 18, 2015, 03:42:08 AM »
Terragen produce really nice hdr for IBL.
You just maybe have to change the sun disc radius, depending of the format and render engine target.

http://www.planetside.co.uk/forums/index.php/topic,16087.msg156811.html#msg156811



(Modo example, using Terragen spherical cam)
Gameloft

Offline mikesmith3d

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Re: How easy is it to generate IBL HDRI?
« Reply #7 on: March 14, 2017, 12:04:18 AM »
Hey sorry to resurrect an old thread, but does this technique still work inT4? My EXR doesnt work as an IBL sphere in mentalray. It turns out very dull and dark as if it's not HDR.

Offline Oshyan

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Re: How easy is it to generate IBL HDRI?
« Reply #8 on: March 14, 2017, 01:13:37 AM »
It absolutely should still work. Do you have Photoshop? If you pull the image into there, or another 32 bit-capable image editor and try to adjust exposure, do you see a lot of dynamic range, or does it clip? Perhaps there is an intensity/brightness modifier in Mentalray for IBL setups?

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