Okay, one last try:
1. Have you tried showing the last mip-level (i.e. avg. lum) in a
separate window so you can check the value?
2. Have you double checked your actual tone-mapping? (say by providing
the average luminance via uniform)?
I'm asking this rather silly questions, because last time I looked for
an error I simply assumed the error to be in a step where indeed it was
not ;-)
cheers
Sebastian
Thank you Sebastian for your support. I appreciate it.
More or less. I don't know the exact wording from the specification, but
the mipmapping should actually do a bilinear interpolation for 4
neighbouring texels per mip level. I've found many examples that used
the last LOD for average lum.
This is what I expecting from the mipmapping to implement my tone mapping
algorithm.
That looks okay. I suppose you are using FrameBuffer Objects and this
the setup code for the texture.
Exactly, I'm using FBO to render-to-texture.
Code:
mainCamera->setRenderTargetImplementation(osg::Camera::FRAME_BUFFER_OBJECT,
osg::Camera::PIXEL_BUFFER_RTT);
Have you simply tried the 1000.0 (it is clamped to the last level)?
Yes I've tried it. But still the issue.
Can you maybe provide a screenshot of your artifacts?
Actually a screenshot will not help you as there is no really artifact.
Basically the screen is flashing. Some particularly views give a brighter image
as no tone mapping was disable. At this moment if I move just a bit the image
come back darker as expected from my tone mapping. It's little bit weird... I'm
wondering if it is actually the mipmapping or if it is conflicting with an
other stuff.
Thanks a lot,
Kenzo
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=50322#50322
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