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sjh1
12-19-2006, 09:31 AM
Why is it that when i render an image on one computer, and then transfer the image to another, the color quality of that image changes?
Its not lost it quality, due to the fact when I transfer the image back the image is as it was in the beginning.
I believe its the graphics card but how do get round this problem so that what i see after compositing an image and color managing that image, it keeps its quality when showing it from computer-computer?
Please help as I am stupid!!!

DELTAadmin
12-19-2006, 09:44 AM
If u render a sequence on different computers:

Please check the gamma setting when rendering - render setting - options - render gamma, and make sure u use the same image editing app, with the same color settings. I think u have to use the same system level color settings too.

If u transfer the image form one computer to another>
Make sure u use the same image editing app, with the same color settings. I think u have to use the same system level color settings too.
It would be good to calibrate your monitors too.
U can determine wether the color valuse has been changed during transfer by picking the same area on the image and checking the rgb infos. In photoshop it is an easy thing.

Per-Anders
12-19-2006, 09:46 AM
Windows has a different gamma to OSX, and each computers monitor is different, unless you pay a hideous amount to have all your monitors properly calibrated, it's just a limitation of current technology, but it shouldn't adversly affect your projects. The problems arrise when you find teh same scene rendered on two different machines result in a different color when combined into a final animation (as in net render) and you get flickering. This is sometimes a fileformat problem, to get around it you need to use a file format that doesn't use/have an inbuilt premultiplied gamma which usually means don't render to avi or quicktime and some of the more heavily compressed file formats, and also not use quicktime or avi movies as textures.

Limbus
12-19-2006, 09:47 AM
You might want to look into a hardwar monitor calibrating device such as the ones from eyeone.

Florian

lllab
12-19-2006, 09:54 AM
to do graphik work you need to calibrate your system and monitor!

eyone or greg mc beth have such things for about 300euros. without that i could not imagine working anymore!

not only get the colors right, the images look much more balanced and beautifull. and mostly the same on each calibrated pc.
dont forget to recalibrate your systems evry 4weeks at least.

cheers
stefan

sjh1
12-19-2006, 10:06 AM
DELTAadmin: Thanks for the advise will check settings

Per-Anders: Thanks also for the advise

Limbus: I have one.
Calibrator will only work on my monitor, due to not all the monitor
are the same in the office.

Thanks to all of you and for the quick response.

Erik Heyninck
12-19-2006, 10:06 AM
Calibration is needed, but limited to the technical limits of your monitor. Some can give visibly more dark greys and blacker blacks than others.

The difference between mac and PC can easily be solved in Photoshop by dragging the gamma slider (the central one) in Photoshop either to 0.8 or 1.2

rob rhodes
12-19-2006, 10:20 AM
Do these calibrators match your monitor to your printer or is it just like an international standard type thing that everyone who has one of these calibrators will see the same image on screen. If so do most printers have such devices - otherwise its a bit pointless! Is there any kind of existing standard between monitor manufacturers and graphics cards companys? If not surely that would be a great selling point so each graphics card had display settings for each or most make and model of new screens so that there was at least a constant level of quality. I know there are thousands of existing models and LCD and CRT outputs are quite different but if new ones could be done like that then more people might upgrade to a new screen - so worthwile for manufacturers!

I must be missing something here otherwise im sure they would have done something like this before!

Rob

Asier3d
12-19-2006, 11:17 AM
The "problem" is that Cinema 4D doesnīt include colour profile inside itīs renders, so when you see the imagen in other computers, that profile mismatch gets your imagen darker or lighter.

If you know your monitorīs profile, you can assign it in Photoshop and problem solved.

Hope itīll help u

sjh1
12-19-2006, 02:43 PM
Erik Heyninck: Having trouble locating the gamma slider in photoshop cs,

Duchamp: Tried it, and worked perfectly on my machine, matching the render output to the
visual in photoshop, yet too try comparison on another machine.

Thanks again to all who have replied.

Steven

dtoxxx
12-21-2006, 06:52 AM
Do other 3D apps use ICC profiles in renders?
Is it something that Maxon is just slow at implementing?

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