I am having trouble adjusting a HDRI that I have purchased from Peter Guthrie. My hope was that it would work out of the box. But I find it is instantly so bright that the screen is blanketed white. I have played around with the HDRI texture power and the environment power, but cant find a happy balance. Is there a recommended base setting when using Peter Guthries HDRI's? I am using a texture environment with the HDRI in the texture node as a RGB image.
Many Thanks.
Peter Guthrie HDRI
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- thefishnut
- Posts: 64
- Joined: Thu Aug 23, 2012 12:08 pm
- Location: Australia
Win 8 64 | 2 x Geforce GTX780 6gb | i7 4790k | 32GB
Using a texture environment with the HDRI loaded in as a RGB Image is the normal way.
Are you using the standalone? What do the specs say for the image eg: 6250x3125 pixels, 96 bpp RGB HDR, 305175 KB.
Is is a .hdr file?
Have you played with the textures gamma in octane? (default is 2.2)
Are you using the standalone? What do the specs say for the image eg: 6250x3125 pixels, 96 bpp RGB HDR, 305175 KB.
Is is a .hdr file?
Have you played with the textures gamma in octane? (default is 2.2)
- Seekerfinder
- Posts: 1600
- Joined: Tue Jan 04, 2011 11:34 am
Also, check your camera exposure & ISO settings. Just perhaps you messed with them in the scene before trying this HDRI.
Best,
Seeker
Best,
Seeker
Win 8(64) | P9X79-E WS | i7-3930K | 32GB | GTX Titan & GTX 780Ti | SketchUP | Revit | Beta tester for Revit & Sketchup plugins for Octane
I had the same problems with them. Had to use Gamma 1.0 in the environment slot plus lowering Iso low to 5 sometimes.
I experienced it with other HDR images too and using the 3dsmax plugin there seems no way to set the image up properly while loading (the little white and black point bix which appears if you click it).
I ended up using the CG-Source skies (http://www.cg-source.com/products_hdris ... at=hdrisky).
They work very well out of the box and you can download low-res versions before buying.
I experienced it with other HDR images too and using the 3dsmax plugin there seems no way to set the image up properly while loading (the little white and black point bix which appears if you click it).
I ended up using the CG-Source skies (http://www.cg-source.com/products_hdris ... at=hdrisky).
They work very well out of the box and you can download low-res versions before buying.
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Sys: Intel Core i9-12900K, 128GB RAM, 2x 4090 RTX, Windows 11 Pro x64, 3ds Max 2024.2
Sys: Intel Core i9-12900K, 128GB RAM, 2x 4090 RTX, Windows 11 Pro x64, 3ds Max 2024.2
Peter Guthrie's HDRIs are very bright I find
What I do is open then in photoshop, and add an exposure layer over the top, bring the exposure down a touch
I also resize them to I dunno, 4000 pixels wide
then save this out as a new version
I think he mentions this in his 'faqs'
What I do is open then in photoshop, and add an exposure layer over the top, bring the exposure down a touch
I also resize them to I dunno, 4000 pixels wide
then save this out as a new version
I think he mentions this in his 'faqs'
workstation well past its sell-by-date, Vista 64 bit (!) with a pitiful amount of RAM, re-invigorated with a GX 590
3ds Max Design 2011 (have 2013 but can't be bothered to re-do all the UI), CS5, and that free z-brush program, whatever it's called
3ds Max Design 2011 (have 2013 but can't be bothered to re-do all the UI), CS5, and that free z-brush program, whatever it's called
also, once you've made your own re-exposed hdr, try then playing with the gamma in Octane, as this affects the strength / definition of the shadows quite a lot
cheers!
cheers!
workstation well past its sell-by-date, Vista 64 bit (!) with a pitiful amount of RAM, re-invigorated with a GX 590
3ds Max Design 2011 (have 2013 but can't be bothered to re-do all the UI), CS5, and that free z-brush program, whatever it's called
3ds Max Design 2011 (have 2013 but can't be bothered to re-do all the UI), CS5, and that free z-brush program, whatever it's called
don't change iso, keep iso 100, gamma 1 to see result better
peter guthrie hdri's very bright, try to keep image's gamma under 1, and very low power
peter guthrie hdri's very bright, try to keep image's gamma under 1, and very low power
If I do this the shadows are nearly gone.
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Sys: Intel Core i9-12900K, 128GB RAM, 2x 4090 RTX, Windows 11 Pro x64, 3ds Max 2024.2
Sys: Intel Core i9-12900K, 128GB RAM, 2x 4090 RTX, Windows 11 Pro x64, 3ds Max 2024.2
- thefishnut
- Posts: 64
- Joined: Thu Aug 23, 2012 12:08 pm
- Location: Australia
Thanks guys.
Why do you say that enigmasi? Changing the gamma to 1 and the iso to about 5 does seem to work. Unless I am missing something. Will changing the iso effect other things I haven't though of?enigmasi wrote:don't change iso, keep iso 100, gamma 1 to see result better
peter guthrie hdri's very bright, try to keep image's gamma under 1, and very low power
Win 8 64 | 2 x Geforce GTX780 6gb | i7 4790k | 32GB
I meant keep default settings for CameraImager. Use low gamma for hdri, like under 1 even, and very low power 0.0... because his hdri's are very bright