As the sun disappears and the shadows decend from the mountaintop

"Truth to material" is a term attributed to Henry Moore that speaks to the use of materials best-suited to the construction of its object, but especially the effort taken to make that material available to the viewer, as opposed to hiding it, either with paint or placing something in front of it. I would say the same might be said of accidents "made" in the name of its installation, a chip or a tear, most recently at the CAG, where one of Kathy Slade's charcoal rubbings from her As the sun disappears and the shadows descend from the mountaintop exhibition (the work closest to the right, above) bears the effort it took to install it (at bottom). Or if not accidents or efforts, then the decision to "live with it"?