Simplify shader.
Merge branch 'feature/new_renderer' of github.com:vrsys/guacamole into feature/new_renderer
nurbs plugin compiles again
added possibility to clear vertex and fragment methods of MaterialShaderDescription; corrected some typos in debug output of MaterialShaderMethod
removed debug output from MaterialShaderDescription
do not load opacity maps
fixed segfault in nurbsnode
Merge branch 'feature/new_renderer' of github.com:vrsys/guacamole into feature/new_renderer
Merge branch 'feature/new_renderer' of github.com:vrsys/guacamole into feature/new_renderer
Use normal map with inverted green channel.
Use computed light color.
Remove color multiplication.
Make ctor public.