Is Texture Paint While In Viewport Render Possible With Cycles? Is it possible to texture paint while rendering with Cycles?
I've done it with EEVEE but can't seem to find anyway to have cycles viewport update while texture painting.
No, render view in Cycles will not update as you paint, no fix for this.
I have spent a lot of time painting in blender, and in the newer post 2.8 builds I find that either Solid View or Material Preview are the best to paint in regardless of which renderer I have set up, and for preview of the paint I swap to the Shading workspace to see it or just set up a duplicate editor in a small view and set that one to render view.