I am using the osgPPU HDR effect, and I noticed some undesirable
artifacts probably caused by the blur effect, or the resample of the
original pass (before the blur). Using the default resample settings
(resample by 0.25 in each direction) I get the result in the attached
screenshot. Look at the edges of the black cables, there are regular
artifacts along their length, they are supposed to be a smooth edge.
If I change the resample to 0.5 or 1.0 in each direction, I don't get
these artifacts, but of course then the glare effect is less interesting :-)
I also saw these parameters which are related to the blur (their name
implies it at least) but changing them doesn't seem to make a
float mHDRBlurSigma = 4.0;
float mHDRBlurRadius = 7.0;
Can anyone give me a hint as to what could help this situation? Perhaps
OpenGL is already filtering the resampled unit and then the blur uses
that badly-filtered image as input? Or perhaps the blur shaders have
some error in them?
Thanks in advance,
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