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Old 01-17-2003, 01:22 AM   #1
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Color Bit Depth:Float

I'm using some float images with combustion 2.1 and if i apply Brightness& contrast or another filter seams that the "high dynamic range" does not appear(the image flattens like if it was 8 bit). The footage is set to float, like the composite. Any suggestions?
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Old 01-17-2003, 01:35 AM   #2
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It should be alright, are you sure the image is floating point? You didnt clamp the range by accident when rendering & then just save it as a float image? Are you using an RPF?
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Old 01-17-2003, 01:55 AM   #3
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I am trying with cineon and 16 bit (with non campled color) .rpf's. Could it be the lut?
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Old 01-17-2003, 02:17 AM   #4
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Could be, You could try view LUT & see if that makes a difference to what it looks like on screen

This might be a no-brainer, but you dont have your desktop depth at 16 bit do you?
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Old 01-17-2003, 02:52 AM   #5
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Well, playing wit Lut i get the dynamic range i wan't(so it's not internally clamped), but I apply then brighnest&contrast and cannot go beyond or below the dynamic range(like in hdrishop changing the exposure)
I would be very glad if I see with and example i'm wrong
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Old 01-17-2003, 03:12 AM   #6
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Try using the histogram in the colour corrector instead of the brightness contrast, just shift around the centre arrow, which should effect a 'gamma' change as opposed to shifting the whole range, that will leave the white & black points alone, & may end up more what you are after.

Also, if that still doesnt work, to narrow down where the problem is arising, you could try rendering out to a floating point TIFF file, & load that up in Combustion & HDR Shop. Then see if it behaves like a HDRI in HDR Shop, that would let you know whether it is your renderer, or combustion that is letting you down.
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Old 01-17-2003, 03:46 AM   #7
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It's not exactly like I imagined in my dreams , but well, seams to work manipulating the histogram. Thanks Chris !!
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Old 01-14-2006, 05:02 AM   #8
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