Hello everyone!

I only started to use Plotly library and I need your help! Probably, my question is very easy.

I created a 3D surface defined by convexhull coordinates of a set of points. As a result, I have all points using go.Scatter3d (some of them inside, some of them as corners of created polyhedra), and a 3D surface using go.Mesh3d, but I want to highlight each edge between points of polyhedra to make the surface more visible.

Now I have this code:

fig = go.Figure()

polyhedra_points = [ ]

coordinates = result_fin[[‘Teta_N’, ‘Teta_V’, ‘Teta_chi’]].values

hull = scipy.spatial.ConvexHull(coordinates)polyhedra_points = hull.vertices.tolist()

coordinates_all = result_fin[[‘Teta_N’, ‘Teta_V’, ‘Teta_chi’]].to_numpy()

polyhedra_coordinates = coordinates_all[polyhedra_points]fig = go.Figure(data=[go.Scatter3d(x=result_fin.Teta_N, y=result_fin.Teta_V, z=result_fin.Teta_chi,

mode=‘markers’,

marker=dict(size = 2, color = ‘blue’),

)

]

)fig.add_trace(go.Mesh3d(x=polyhedra_coordinates[:, 0],

y=polyhedra_coordinates[:, 1],

z=polyhedra_coordinates[:, 2],

text = polyhedra_df.composition, #we see only the names of the polyhedra points

color=“blue”,

name=‘Laves’,

contour = dict(color = ‘blue’, show = True, width = 10),

#facecolor = polyhedra_coordinates,

flatshading=True, #helped a bit to see edges

lighting=dict(ambient=0.6, diffuse=0.8), #helped a bit to see edges

opacity=.4,

alphahull=0

),

)fig.update_traces(showlegend=True)

fig.update_layout(title=“Structural 3D map”,

legend_title=‘Phase name’,

scene=dict(

xaxis = dict(title=r’Theta_N’, nticks=10, range=[-1,1]),

yaxis = dict(title=r’Theta_V’, nticks=10, range=[-1,1]),

zaxis = dict(title=r’Theta_chi’, nticks=10, range=[-1,1]))

)fig.show()

With this code I have this plot:

I want to have something like this (this plot was done in matplotlib, I need edges like in it):

I marked as a comment #facecolor = polyhedra_coordinates - maybe using this parameter is it possible to highlight edges with the same colour that the points, but by this way, as I put it, it didn’t work. So, if I use this facecolor parameter then I have this result, but not highlighted edges:

Can you give me some recommendations how to get highlighted edges?

Thanks in advance!