Help on changing the color of a poly edge in Makie

General Usage
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1

Hi, I plotted a small 3D mesh using poly in Makie, I use a LScene because I want to put several 3D axis and do camera rotations.
I try to change the color of one of the edge of the mesh. My idea is to plot the edge above the mesh, using poly, but it crashes when I try to plot the line in the LScene. MWE:

using CairoMakie

#### mesh data set up
vertices = [ 0.0 0.0 0.0;    0.7 0.2 0.1;    0.5 0.9 0.0;    0.5 0.35 0.9;    0.0 0.7 0.6; ]
faces = [ 1 2 3; 1 2 4; 2 3 4; 1 2 5; 2 3 5; 3 1 5; 4 2 5; 4 3 5; 4 1 5; ]
volumes = [ 1 2 3 5; 1 2 5 4; 2 3 5 4;]
vlist = [Point3(x) for x in eachrow(vertices)]

#### plot
fig = Figure(; resolution=(800,300))
lscene1 = LScene(fig[1, 1], show_axis=false)
poly!(lscene1, vertices, faces, strokewidth=3, shading=true, color=:transparent, strokecolor=:black)

points_of_edge_to_color = [vlist[2],vlist[4]]

# this works (but plots in a different, 2D axis)
# poly(points_of_edge_to_color, strokewidth=true, strokecolor=:red)

# this crashes, when the fig is displayed
poly!(lscene1, points_of_edge_to_color, strokewidth=true, strokecolor=:red)
fig

The error is

Error showing value of type Figure:
ERROR: MethodError: no method matching iterate(::Nothing)

Thank you by advance for any help :slight_smile: