JUst started to look at Designer and Im looking to showcase a few materials. What are artists using to present there finished matarials like this? Marmoset? Game Engine? Maya, Max? Or a render withing Designer of Painter?
In Substance 3D Designer; you can use the PBR Render node to very quickly generate a high quality render of your material. It is what we use for generating our preview thumbnails in Substance 3D applications and the Substance 3D assets website!
Regarding third party solutions, Marmoset Toolbag is a popular tool for producing these renders very quickly.
While a game engine such as Unreal Engine or 3D authoring packages like Autodesk's Maya and 3ds Max can produce high quality renders, these require a bit more work to get such results.