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Old 09-29-03, 04:56 PM   #1
jonathan
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Default 48 bit display cards?

What if anything is being done to support 48 bit display for the film production world at this time?

curent work on feature projects is almost entirely done in linux however we still have to rely on some old SGI octanes to check on color as none of the current nvidia hardware will support 16 bit per channel display like the old SGI octanes could 10 years ago.

Is this sement of the market being completely abandoned or can we expect some development on this front in the near future?
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Old 09-29-03, 05:21 PM   #2
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Is that because SGI octanes are capable of doing 48bit colour as they are so powerful, we are not talking standard here surely?
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Old 09-29-03, 05:34 PM   #3
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Just a guess but I think Matrox will produce a PC card that supports 48-bit color first. I would love to use one, too, for my photography work since RAW files captured by most digital cameras are in 36-bit color.
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Old 09-29-03, 05:37 PM   #4
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yes, the standard configuration since the MXI was cabable of displaying 48 bit color to graphics. It has been the indistry standard for many years and it is the primary reason that high end finishing tools like Piranha and Inferno remain on SGI hardware.

True the machines CPU perfomance is just simply pathetic, cost per user is astronomical, but there is nothing in terms of graphics performance anywhere else that can get the job done. Since we switched to linux we have been really pleased with everything from stability to performance, however the performance in true film colorspace (whether 12 bit log or 16 bit linear) has been a major disappointment.

Current SGI Octanes are capable of the following:

32-bit RGBA (8,8,8,8) double-buffered, 24-bit Z buffer, 8-bit stencil
32-bit RGBA (10,10,10,2) double-buffered, 24-bit Z buffer, 8-bit stencil
48-bit RGBA (12,12,12,12) double-buffered (Octane2 V8, V12) 16 bit Z buffer
16-bit RGBA quad-buffered (stereo), 24-bit Z buffer, 8-bit stencil
12-bit Color index, double-buffered, 24-bit Z buffer, 8-bit stencil
12-bit Color index, quad-buffered (stereo), 24-bit Z buffer, 8-bit stencil
8-bit overlay and 8-bit window ID
96-bit (24,24,24,24) hardware accumulation buffer

Now we're not asking for all of this, but this is the low end Octane that ships now and not the high end tools like Fuel or Tezro.

Again, yes, the CPU and cost performance are insane but the graphics performance is there. I just want to know when we'll see it on linux from nvidia or if we're barking up the wrong tree.

These cards we have now are great for TV and games, but high bit depth film work is just not an option given the current cards if you need to achieve true negative matched VFX in film production, especially when compositing given that our source s 12bit log or 16 bit linear per channel.
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