I've used a single raw image and you can get some OK results, but the 
quality of your final images can suffer quite a bit with only having one 
source image.

Brian Cluff

On 07/27/2016 07:14 AM, Michael wrote:
> I emailed one of the developers and while I'm sure most of you know 
> what he told me I thought I would share it with the group.:
>
> In luminance you can create an hdr from a single image if you have 
> saved it in raw (raw files usually use 12bits or more for every 
> channel so a larger dynamic range than jpegs). Luminance can take 
> advantage from that and of course you can then use its tonemapping 
> operators. So if you shoot raw just open a single picture in luminance 
> and play with the many operators settings, all the alternatives are 
> "fake"...
>
>
> -- 
> :-)~MIKE~(-:
>
>
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