Here's beta.y
Hopefully this addresses all of the outstanding issues...
Folder-browser 'populate' code updated for Mac compatibility.
Ongoing problems with 'populate' running at right time across PC & Mac platforms resolved.
Sun-vector forced normalization addressed.
Glitch with lens/focal numerical values from the sliders with 'to_strings' corrected.
The MTL's 'Default_Material' now uses the model's active style's current 'FrontFaceColor' RGB values.
New status-bar tips and mouse-over tooltips added; and new 'Octane Render' Context-menu item and Toolbar added.
Dialog background now has 'rays' added from the Octane Render logo.
All users should upgrade to the new version.
Feedback please...