Support custom colorscales with rgba on surface traces

[kapraran]

Demo

As you can see on the colorbar next to the plot, most of the surface should be transparent. Instead, it's colorized according to the rgb values of the rgba colorscale (completely ignoring the alpha).

I don't know if this is the expected behavior, but i guess that it's a bug.

Thanks

[archmoj]

@nikosk93 instead of surface have you ever tried using mesh3d trace?

[kapraran]

No, i haven't. It seems a bit more complex than the surface one, but i'll give it a try.

[archmoj]

@nikosk93 here is a codepen to give you an idea!

[kapraran]

@archmoj wow thanks for your help.

I replicated it a bit by myself here but i had trouble setting the colors. I'll check your pen!