[Bf-committers] HDR rendering using 8bpc

[Tom Edwards]

Here's exactly what I'm talking about: 
http://img15.imageshack.us/img15/745/rgbm.png

Left side 16-bit float, right side 8-bit RGBM. As you can see RGBM is 
okay in bright and dark areas, but really suffers in between.

(No idea why the RGBM image is darker BTW, not seen that before.)

On 11/03/2012 6:24, Tom Edwards wrote:
> Well okay, perhaps "lots" was an overstatement. But there is
> nevertheless noticeable banding, particularly if you use the image in a
> skybox like I did. Have a look at the colour distribution chart here:
> <http://iwasbeingirony.blogspot.com/2010/06/difference-between-rgbm-and-rgbd.html>.
>
> On 11/03/2012 2:57, Tom M wrote:
>> On Sun, Mar 11, 2012 at 2:07 AM, Tom Edwards<contact at steamreview.org>   wrote:
>>> 8-bit HDR is (shock horror!) low quality stuff which leads to a lot of
>>> colour banding. The performance boost is good for games, but not worth
>>> it for rendering. :)
>> Actually if you read the articles there wasn't any color banding
>> observed even in the most extreme test they tried.
>>
>> LetterRip
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