Publish a transparent marker with non-transparent edge

edit

Hello developers

I am currently working with publishing marker in ros as a topic and is successful in publishing different types. It would be my next step to make the markers transparent with the edge of the marker non transparent, meaning if I want to publish a cube, the edges of the cube only needs to be visible not the faces and so the the edge is essentially transparent.

Reason : The idea behind this is to visualise the surrounding in the form of transparent cubes and observe sensor detentions of the objects in side the cubes.

thanks in advance

Vignesh