add steel strut that looks like it has a band wrapped around it

meant to be used when something is placed against the side, so that that
thing appears to be mounted to the strut, such as a Technic mains
transformer ("supply converter") mounted near the top of a tall electrical
pole.

Note: uses wallmounted param2 to allow rotation, rather than facedir
mode. I want to allow for Unified Dyes colorization of a derivative of
this node in another mod, and wallmounted mode uses fewer bits for
rotation than facedir, leaving more for color info.

init.lua

@@ -100,8 +100,11 @@ minetest.register_node("steel:plate_rusted", {
 	sounds = default.node_sound_stone_defaults(),
 })
 
+local base_tex = "strut.png"
+
 if minetest.registered_nodes["streets:steel_support"] then
 	minetest.register_alias("steel:strut","streets:steel_support")
+	base_tex = "streets_support.png"
 else
 	minetest.register_node("steel:strut", {
 		drawtype = "glasslike",
@@ -114,6 +117,26 @@ else
 	})
 	minetest.register_alias("streets:steel_support","steel:strut")
 end
+
+minetest.register_node("steel:strut_mount", {
+	description = "Strut with mount",
+	drawtype = "mesh",
+	mesh = "steel_cube.obj",
+	tiles = {
+		base_tex,
+		base_tex,
+		base_tex.."^steel_strut_overlay.png",
+		base_tex.."^steel_strut_overlay.png",
+		base_tex.."^steel_strut_overlay.png",
+		base_tex.."^steel_strut_overlay.png",
+	},
+	is_ground_content = true,
+	paramtype= "light",
+	paramtype2 = "wallmounted",
+	groups = {choppy=1,cracky=1},
+	sounds =  default.node_sound_stone_defaults(),
+})
+
 minetest.register_node("steel:grate_soft", {
 	description = "Soft Steel Grate",
 	drawtype = "fencelike",
@@ -266,6 +289,22 @@ minetest.register_craft({
 		{'default:steel_ingot', 'default:steel_ingot', 'default:steel_ingot'},
 	}
 })
+
+minetest.register_craft({
+	output = 'steel:strut_mount',
+	recipe = {
+		{'steel:strut', 'default:steel_ingot'},
+	}
+})
+
+minetest.register_craft({
+	output = 'steel:strut_mount',
+	recipe = {
+		{'streets:steel_support', 'default:steel_ingot'},
+	}
+})
+
+
 	--remelting recipes
 
 minetest.register_craft({
@@ -318,5 +357,3 @@ minetest.register_craft({
 })
 
 
-
-

models/steel_cube.obj

@@ -0,0 +1,50 @@
+# Blender v2.79 (sub 0) OBJ File: 'simple-cube.blend'
+# www.blender.org
+o Cube_Cube.001
+v 0.499468 -0.499468 -0.499468
+v 0.499468 0.499468 -0.499468
+v 0.499468 -0.499468 0.499468
+v 0.499468 0.499468 0.499468
+v -0.499468 -0.499468 -0.499468
+v -0.499468 0.499468 -0.499468
+v -0.499468 -0.499468 0.499468
+v -0.499468 0.499468 0.499468
+vt 1.000000 1.000000
+vt -0.000000 1.000000
+vt 0.000000 -0.000000
+vt 1.000000 0.000000
+vt 0.000000 -0.000000
+vt 1.000000 0.000000
+vt 1.000000 1.000000
+vt -0.000000 1.000000
+vt 0.000000 1.000000
+vt -0.000000 0.000000
+vt 1.000000 -0.000000
+vt 1.000000 1.000000
+vt 1.000000 -0.000000
+vt 1.000000 1.000000
+vt 0.000000 1.000000
+vt -0.000000 0.000000
+vt 1.000000 0.000000
+vt 1.000000 1.000000
+vt -0.000000 1.000000
+vt 0.000000 -0.000000
+vn 0.0000 1.0000 0.0000
+vn 0.0000 -1.0000 0.0000
+vn -1.0000 0.0000 0.0000
+vn 1.0000 0.0000 0.0000
+vn 0.0000 0.0000 1.0000
+vn 0.0000 0.0000 -1.0000
+g Cube_Cube.001_top
+s off
+f 8/1/1 4/2/1 2/3/1 6/4/1
+g Cube_Cube.001_bottom
+f 3/5/2 7/6/2 5/7/2 1/8/2
+g Cube_Cube.001_right
+f 7/6/3 8/1/3 6/9/3 5/10/3
+g Cube_Cube.001_left
+f 1/11/4 2/12/4 4/2/4 3/5/4
+g Cube_Cube.001_back
+f 3/13/5 4/14/5 8/15/5 7/16/5
+g Cube_Cube.001_front
+f 5/17/6 6/18/6 2/19/6 1/20/6