Scatter 3d - strange blending when specifying opacity per point using rgba

[joshua-gould]

I have attached 3 plots of the same points. The first plot does not set an opacity and looks good. The second plot sets marker.opacity=0.1 and looks ok. The third plot sets the alpha value of every element in marker.color to 0.1 and looks terrible.

[archmoj]

There are some slight differences in this demo, but...
Would you mind sharing a codepen to help us find the source of this problem?
Thanks!

[archmoj]

On another note implementing opacityscale for scatter3d (#3940) may be helpful too.

[joshua-gould]

I created an example at https://jsfiddle.net/joshuagould/d56utzao/6/

[archmoj]

@joshua-gould
Thanks very much!

[archmoj]

May be related: #3138

[gvwilson]

Hi - we are currently trying to tidy up Plotly's public repositories to help us focus our efforts on things that will help users most. Since this issue has been sitting for several years, I'm going to close it. If it's still a concern, we'd be grateful if you could open a new issue (with a short reproducible example if appropriate) so that we can add it to our backlog. Thanks for your help - @gvwilson