Under Marvin Render Options I can choose Backround. However I see no option for transparent background and according to marivn dock this should be possible.
Thank you for your feedback.
I will implement the feature into our extensions.
By the way, when would you like to use it?
If you would like to use this feature in the MolExporter node to write image file, I will add it into the MolExporter node.
(not in Marvin Renderer Settings)
I have implemented the feature into our extensions.
It will be available in next version.
After all, I have added it into Marvin Renderer Settings.
Because you can use the "Renderer to Image" and "Image Column Writer" nodes to write images with transparent background.