@gumwars The 3D model would be mine, as would the render created to present it.

Even though I'm not required or asked to... Yes, I do attribute the software when I present a render, commercial or FOSS.

However, if I were to publicly show a painting or a drawing or a film print, no, I don't credit the paint's or camera's maker, nor do I feel their branded technical expertise in their products is relevant. They are simple non-thinking tools.