- options to show with alpha-over (checkered backdrop), only alpha (BW) and when available: the zbuffer. Note: it's icons in the header, I just re-used existing ones, no time now for fancy design. :) Also: recoded the way alpha-only draws, also in renderwindow. Mucho faster! Oh, and sampling the buffer with LMB now displays z values in float range of 0.0 to 1.0. Note that we still save signed int in files for Z...