Hi Oliver,
Sorry to step in this late in the discussion.
When creating HDRI panos, it's best not to use PS for this. For quick
stitching it's OK I guess.
32bit editing in PS is very wonky imho, and there are optimized tools
for this out there.
Like you said hdrshop and Picturenaut, but also PTGui (one of the best)
or Hugin if you want to keep it free.
Your 8 bit souce material sounds like 'fun', and a bit more
colorcorrection than usual will be unevitable I guess.
If you're interested in hdri pano stuff, have a look at hdrlabs.com.
There's lots of info, also reviews of hdri dedicated applications.
cheers,
Rob
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On 23-9-2013 9:10, olivier jeannel wrote:
Thank's Luc Eric.
I have to admit the material I was given to build the Hdr had all the
"things you shouldn't do" all in one.
- Raw pics, but in 8 bits.
- Bizarre compression making it looks like a scotland tissue in close up
(really true).
- Sun shot in the ultimate rim of the ball (10° more and it was back
lighted).
- Shaked shot so that the pics don't align together.
So everything to have artifacts.
Hoppefuly, it's not so bad in 16bits.
I was just hopping it was some button I didn't check.
I'm not to keen in digging into clamping values, since I'm almost sure
it will be hazardous.
Oh, and I made another "build" in Hdr shop (or was it Picturenaut ?)
well I get a different result (colorwise) than in Photoshop.
Spent my sunday rebuilding a fake (simple) backplate (oh yeah, they
didn't shot the backplate properly).
:DDDDDDDDD
Le 20/09/2013 18:08, Luc-Eric Rousseau a écrit :
in my opinion, you have to lower the exposure in Softimage to look at
the image and see it properly, but we really don't have any HDR tone
mapping toolsto deal with the highlights. It's tone-mapped in
Photoshop. It's an HDR image, so it can have large yellow or red
values and when you just clamp that down (i.e. truncate value above
1.0) to 8-bit like the fxview does it looks weird. You can click down
in the fxviewer to see the pixel color values.
Photoshop is probably showing you what you really "want" to see, which
is an 8-bit snap shot at a particular exposure, with something to
smootly filter out the highlights. How well does the image work in
base lighting? I think it probably works fine.
try launching imf_disp at the softimage command prompt. The recent
versions of mental ray's imf_disp tool have tone mapping and exposure
controls in the view menu.
On Fri, Sep 20, 2013 at 11:46 AM, olivier jeannel
<[email protected]> wrote:
Hey Luc Eric,
I'm rendering with RedShift.
I've opened it in the FX Viewer and it's "yellowish" as well.
If you think of something, let me know...
Cheers,
Olivier
Le 20/09/2013 17:27, Luc-Eric Rousseau a écrit :
the image clip ppg image is just an 8-bit preview with cooked
conversion. render out with mental ray to see the actual image. or
look at it in the fxtree fxviewer , which does support floating point
images. Of course, any hdr value will clip if you are not using any
tone mapping
On Fri, Sep 20, 2013 at 8:35 AM, olivier jeannel
<[email protected]> wrote:
Hello there,
It's the first time I'm "building" my own HDR's environment from a serie of
photos (Raw 8bit from Canon 5D).
Basicly it's a desert set : Sand + cloudy sky.
I'm using Photoshop to do this, I use "Merge to HDR" to build the .hdr.
The thing is in photoshop I'm having fine colors :
Sand is orange/brown and the sky is blue
BUT
In Softimage Sand is yellow and the sky is purple (-ish)
See attached picture :
Is there a setting somewhere (maybe even in photoshop) that I should check ?
Thank's a lot !
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