General Discussions

[cruprutric]

Hello,

I've read several previous posts on this forum regarding the number of lookup tables (LUT) in amd graphic cards.

Back in 2012 amd seemed to have confirmed that

Radeon ===> 1 LUT

Firepro ===> 2 LUT

https://community.amd.com/message/1285510?q=Lookup%20Tables%20(LUT)

The same trend seems to have been present in 2017 when someone asked about the RX 480

https://community.amd.com/message/2786298#comment-2787084

Am I correct in assuming that this trend is still true for all the cards to this date , and probably for upcoming cards like the Radeon 5500?

Thank you!

[leyvin]

The Look-Up Tables are part of the Programmable Colour Compression and yes are still present even on Navi. 

Mind these are as a note a key reason as to why Colour Modes are costless on said Hardware... unlike NVIDIA Hardware., and while and argument can be made that it reduces the Colour Ranges; the reality is AMD do pour a lot of R&D into Colour Reproduction on their Hardware; with a focus on what can be physically be perceived.

I mean keep in mind all Tone Mappers are, which are still used for HDR/WCG; are LUT. 

They're somewhat necessary., and likely will be for some time; but remember AMD Hardware is still CAPABLE of running in Native FP16 Per Channel (if desired).