Hi Clement, On 15 September 2017 at 02:57, <[email protected]> wrote:
> I am using volume rendering with ray traced technique. I saw black > color along the edge of image. I checked the shader code. There is a > variable called fragColor and initial value is set to vec4(0.0, 0.0, 0.0, > 0.0);. I would like to know why this value is using black on initial. > Should we use background colour for the initial? Thanks. > Look at the shader - it accumulates the colour contributions along the ray so you have to start with 0. You wouldn't do a summation of sequence without starting at zero, so it's the same for accumulating the colour. Robert.
_______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
