Hi Thanks robert for your suggestion, yes this seems the case, the terrain is very very large. I wiil try your suggestion soon. Thanks! Bye!
robertosfield wrote: > Hi Dario, > > The issue looks like one of depth precision of the shadow map such > that the depth test makes an erroneous judgment about whether the > front surface is in shadow or not, this often is a surface self > shadowing itself. The normal solution is to use a polygon offset in > the shadow map generation so that the surface doesn't shadow itself, > if this polygon offset is too small you still get the self shadowing > artifact if the value is too large you no longer get shadows where you > should see them. > > The better the depth precision of the shadow map the lower the polygon > offset will be required, and in your case perhaps it's the ground > layer that is very large and it part of the shadow casting scene to > pushes out the depth range of the shadow map reducing it's precision. > If this is the case then using the Cast/RecivesShadowMask > functionality would be appropriate as this will you could use the mask > to avoid the ground being used in the shadow map generation. > > Robert. > > On 24 August 2012 14:57, Dario Minieri <> wrote: > > > Hi, > > > > I'm using a shadowed scene with LightSpacePerspectiveShadowMapCB technique > > with a single light. I've seen that in some positions of the camera, the > > shadows appear artifacts, while in other positions not. See snapshots. > > Moving the camera in a continuous manner, this results in an annoying > > "shadows flickering" on the objects. > > > > You have some kind of idea for that? GLSL Shadow shader issue? Graphix card > > issue? Other? > > > > Thank you! > > > > Cheers, > > Dario > > > > ------------------ > > Read this topic online here: > > http://forum.openscenegraph.org/viewtopic.php?p=49505#49505 > > > > > > > > > > _______________________________________________ > > osg-users mailing list > > > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > > > > _______________________________________________ > osg-users mailing list > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > ------------------ > Post generated by Mail2Forum ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=49522#49522 _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
