Good afternoon to all!
My question is:
Is it possible to limit the visible materials in materials list to the active scene?
Don’t see the point to have a very big list of materials if a lot of them don’t belong to the actual scene.
Thank you!
are you using more then one scene ?
material are under scene hierarchy as I know of !
happy cl
Not really… they are stored in bpy.data.materials, which is scene independent.
@MADCello, unfortunately the template_ID() is hard coded and iirc it cannot be changed from the UI perspective… 
at top right for outliner
you have a choice to select current scene so this should limit mat to the current scene
data is one list for file agreed
but there is a hierarchy of things in bl
File - scenes - layers - Objects- Mat
but not all windows use all the possibilities
might give more possibilities with script
happy bl
Yes, in the outliner that works, but in the material tab, it will still show all the materials in the blend file.
Thank you all!
Could be added to the wish list, to simplify stuff! 
Thank you JuhaW. Interesting Addon, have to explore it!