JQL, sorry your "gardening" efforts haven't born fruit. Your right that Twilight has it's roots in KT. Really surprised that other render engines don't have a bevel function, particularly those that are a lot more pricey than Twilight. "planting a seed" might have been the wrong term. Sounds like it's time for screaming, shouting and name calling.....

There it is, TBoy:

class BoundsHighlighterTool def initialize @ip = Sketchup;;InputPoint.new @hovered_inst = nil @global_parent_tra = nil @global_bb = nil @labb_global_faces = [] # Faces for the local axes aligned bounding box. @gabb_global_faces = [] # Faces for the global axes aligned bounding box. @labb_global_edges = [] @gabb_global_edges = [] @labb_face_color = Sketchup;;Color.new(255,40,0,80) @gabb_face_color = Sketchup;;Color.new(0,40,255,80) @labb_edge_color = Sketchup;;Color.new(255,0,0,255) @gabb_edge_color = Sketchup;;Color.new(0,0,255,255) @edge_width = 3 end def deactivate(view) reset(view) end def onMouseMove(flags, x, y, view) @ip.pick(view, x, y) ip_path = @ip.instance_path if ip_path.empty? reset(view) return end inst = nil gptra = nil ip_path.each { |ent| break if !ent.is_a?(Sketchup;;Group) && !ent.is_a?(Sketchup;;ComponentInstance) if gptra gptra = gptra * inst.transformation elsif inst gptra = inst.transformation end inst = ent } unless inst reset(view) return end return if inst == @hovered_inst @hovered_inst = inst @global_parent_tra = gptra local_bb = @hovered_inst.bounds # Obtain corners of local axes aligned bounding box in global space lagc = [] for i in 0..7 lagc << local_bb.corner(i) end if @global_parent_tra lagc.each { |point| point.transform!(@global_parent_tra) } end @labb_global_faces = [ [lagc[0], lagc[2], lagc[3], lagc[1]], [lagc[4], lagc[6], lagc[7], lagc[5]], [lagc[1], lagc[0], lagc[4], lagc[5]], [lagc[2], lagc[3], lagc[7], lagc[6]], [lagc[0], lagc[2], lagc[6], lagc[4]], [lagc[3], lagc[1], lagc[5], lagc[7]] ] @labb_global_edges = [ lagc[0], lagc[2], lagc[2], lagc[6], lagc[6], lagc[4], lagc[4], lagc[0], lagc[3], lagc[1], lagc[1], lagc[5], lagc[5], lagc[7], lagc[7], lagc[3], lagc[0], lagc[1], lagc[2], lagc[3], lagc[4], lagc[5], lagc[6], lagc[7] ] # Create global axes aligned bounding box @global_bb = Geom;;BoundingBox.new() @global_bb.add(lagc) # Obtain corners of global axes aligned bounding box in global space gagc = [] for i in 0..7 gagc << @global_bb.corner(i) end @gabb_global_faces = [ [gagc[0], gagc[2], gagc[3], gagc[1]], [gagc[4], gagc[6], gagc[7], gagc[5]], [gagc[1], gagc[0], gagc[4], gagc[5]], [gagc[2], gagc[3], gagc[7], gagc[6]], [gagc[0], gagc[2], gagc[6], gagc[4]], [gagc[3], gagc[1], gagc[5], gagc[7]] ] @gabb_global_edges = [ gagc[0], gagc[2], gagc[2], gagc[6], gagc[6], gagc[4], gagc[4], gagc[0], gagc[3], gagc[1], gagc[1], gagc[5], gagc[5], gagc[7], gagc[7], gagc[3], gagc[0], gagc[1], gagc[2], gagc[3], gagc[4], gagc[5], gagc[6], gagc[7] ] view.invalidate end def draw(view) return unless @hovered_inst # Draw local axes aligned global bounding box view.drawing_color = @labb_face_color @labb_global_faces.each { |face| view.draw(GL_POLYGON, face) } view.drawing_color = @labb_edge_color view.line_width = @edge_width view.line_stipple = '' view.draw(GL_LINES, @labb_global_edges) # Draw global axes aligned global bounding box view.drawing_color = @gabb_face_color @gabb_global_faces.each { |face| view.draw(GL_POLYGON, face) } view.drawing_color = @gabb_edge_color view.line_width = @edge_width view.line_stipple = '' view.draw(GL_LINES, @gabb_global_edges) end def reset(view) return false unless @hovered_inst @hovered_inst = nil @global_parent_tra = nil @global_bb = nil @labb_global_faces.clear @gabb_global_faces.clear @labb_global_edges.clear @gabb_global_edges.clear view.invalidate return true end end # class BoundsHighlighterTool Sketchup.active_model.select_tool(BoundsHighlighterTool.new)

This time we iterate through the InputPoint's instance_path and transform the bounding box of the deepest instance across all the the parent groups/component instances in the path.