An option to render edge lines with widths defined in terms of LDraw Units (relative to the rendered size of a brick, in other words) would be useful. Currently, the same edge thickness setting - the third notch, for instance - yields the same line thickness regardless of snapshot resolution. This means that if I save a snapshot of the model that is 600x400 pixels, the edge lines will appear very thick, but if I save a snapshot at 3000x2000 pixels, the same setting yields edge lines that look very thin. (Attached are such examples.)
I think it would be useful to be able to depict the same "appearance" at any resolution.