Re: [Yafray-devel] Producing HDR images with yafray

[Alfredo de Greef]

Unless you really need tiff format, you are aware that
it is possible to save HDR images in either radiance
.hdr or OpenEXR format? At least in the current cvs it
is.
I really would have to see your code, but I can't see
why you would be unable to get the full range.
You are using a floatbuffer?
Also make sure that you bypass tonemapping
(exposure/gamma). Look at the HDR_io/EXR_io files and
the render code in scene.cc as an example.
Are you actually using current cvs or older code?


--- address@hidden wrote:
> 
> Hello,
> 
> I've patched yafray to get it to output unclamped
> floating point (HDR) images in TIFF format.
> 
> It works fine in the sense that I get the full
> floating point dynamic range in penumbra areas,
> which gives me a lot more freedom at the compositing
> stage.
> 
> However, I haven't been able to get it to output
> unclamped floating points values, specifically
> pixel intensity values above 1 (which are essential
> to get clean lens flares in low light scenes with
> spotlights.)
> 
> Instead of digging through the code, I thought
> you guys may be able to point out why things are
> this
> way (why I can't get a pixel intensity value above
> 1),
> and where I may intervene in the code to fix this.
> 
> Also, if the floating point TIFF output code
> interests
> anyone, I can post that.
> 
> Cheers,
> 
>     - Emmanuel
> 
> 
> 
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> Yafray-devel mailing list
> address@hidden
>
http://lists.nongnu.org/mailman/listinfo/yafray-devel
> 


                
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