[Bf-committers] Cinepaint & high definition color support
stephane.soppera at wanadoo.fr
Fri Aug 20 21:13:03 CEST 2004
Ton Roosendaal wrote:
> Hi all,
> At the Siggraph Blender BOF we also had a discussion with the
> maintainer of CinePaint (formerly filmgimp). He mentioned that he was
> developing a generic library to work with arbitrary depth color buffers:
> Having Blender reading/writing high definition color buffers is a
> long wanted feature, but it has some implications... especially with
> all Blender internals and the Imbuf library being defaulted
> (hardcoded) to 4x8 bits.
> However, as a first step I can code an option that retains the (hi
> def) render buffer Blender already uses. This is 4x16 bits for
> normal render, and 4x32 for unified. This then can not only be used
> for gamma/brightness/contrast adjusting, but also exported using the
> CinePaint lib.
> Reading back such files, and use it for textures we can then can
> still postpone, until we find the solution for how to integrate this
> in the current image/texture code in Blender.
> A) would that satisfy?
Is the 4x32 unified color buffer an HDR (High Dynamic Range) one? I mean
can colors in this buffer be greater than 1 (assuming 1 is white)? That
could be interesting to have an HDR image buffer (maybe is it called a
floating point image buffer) to have correct motion blur and glow on
highlights or when facing a halo light. It can also be interesting to
change exposition after rendering, without needing to render again.
Another interesting feature would be to be able to write sequence
plug-ins using HDR images.
Support for HRD images (with colors greater than 1) will also be very
- reflection textures
- combined with Ambient Occlusion, can't that be used to do image based
Thanks for your work,
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