Transparent Scatterplot Points in Base R & ggplot2 | Decrease Plot Opacity
image - Matplotlib Plots Lose Transparency When Saving as .ps/.eps - Stack Overflow
3D Scatter transparency not activated by marker.color or marker.line.color as well as line.color and errorbars alpha channel · Issue #3492 · plotly/plotly.js · GitHub
Change the line opacity in Matplotlib - GeeksforGeeks
Change the line opacity in Matplotlib - GeeksforGeeks
alpha value of markeredgecolor is overwritten by markerfacecolor · Issue #4914 · matplotlib/matplotlib · GitHub
python 2.7 - Matplotlib: how to change alpha of edges only - Stack Overflow