This hardware-agnostic rendering plug-in for Blender uses accurate ray-tracing technology to produce images and animations of your scenes, and provides real-time interactive rendering and continuous adjustment of effects.
In the material editor, RPR uses the material output that was last clicked. This makes having preview materials for eevee impossible, as different things cause the material outputs to change order, and youll randomly get an eevee material wrapped up in your prorender ones.
Ultimately, adding an RPR target to the material output node would likely be the best way around this, but that would exclude it being added in projects when prorender wasnt set as the renderer, however, at the very least, any target besides ALL should be ignored for the sake of the materials system working as intended.
Example blend file prorendermats.zip
In the material editor, RPR uses the material output that was last clicked. This makes having preview materials for eevee impossible, as different things cause the material outputs to change order, and youll randomly get an eevee material wrapped up in your prorender ones.
Ultimately, adding an RPR target to the material output node would likely be the best way around this, but that would exclude it being added in projects when prorender wasnt set as the renderer, however, at the very least, any target besides ALL should be ignored for the sake of the materials system working as intended.