[vtkusers] vtk rendition is too dark with XFree86

[Chen, Elvis]

greetings,

I managed to compile vtk4 on a FreeBSD 4.5  with
XFree96 4.1.0.  The video card is Matrox G400.  With
XF86's DRI support, the performance of OpenGL is
actually not bad.

One minor problem is, vtk rendition is VERY dark when
compared to vtk on, say, Solaris (Ultra 10 with
Creator 3D).  I suspect it has something to do with
gamma-correction being not turn-on.  Does anyone have
an explaination/solution to this?

thanks in advance,

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