openscenegraph OSG

i am using openscenegraph for rendering .flt files.Using osgviewer i can walk thru .flt file. my model(.flt) is forest terrain.
my problem is, i am seeing white line between two trees.what may be the problem?
is it problem of visual database? i have a image showing the problem.i have marked the problem in red. Please help me to find out the solution.
Thanks in advance.

Link to the image

Dude! Please don’t cross post.

I can see the problem in instances of one particular tree.If the tree is generated in parts ( i.e Scene graph), it may that the parts are misaligned.

Other vague reason can be , assuming the tree is textured , some problem with the texture.

Hope this helps.

Adjust your alpha func and turn on alpha blending.

Any follow-ups please post to this thread.

This has nothing to do with “OpenGL Shading Language”.