Painting on the opacity channel in Octane Materials

[orionds]

Hi and thanks for running this forum - I have solved so many little problems by reading other people's posts and replies here. Overall I really like using Octane Materials but I'm interested in making some of the edges of the objects rough or irregular without distorting the object's geometry. I've been trying to use the opacity channel to do this. I realize I could do a "set selection" on the object and drop in an Octane portal material there, but the results are blocky and not organic. The only way I've found that works so far is to take an image of the object UV over to Photoshop, paint in black and then drop this black and white file in on the Opacity channel. This works alright but it takes a long time and its not very accurate. Cinema 4D BodyPaint 3D tools allow you to paint on the opacity channel while the material is on the object, but I can't get BodyPaint to work with Octane Materials.

1. Has anyone had any luck using BodyPaint with Octane Materials?
2. Or are there other ways of painting on the opacity channel on an object (that is using an Octane Material)?

Thanks very much for your time!

[Jengo_1]

I use the bodypaint a lot for certain details - whenever you paint and save the project it saves a .tif file with the bitmap image you drew in the same proejct folder
Then I just use that .tif image as an image texture in the octane material, can plug it to any node that accepts image textures

[orionds]

Thank you so much! I will try that out. It's probably my unfamiliarity with BodyPaint that has made me unable to use it. I will definitely check the project folder.