I'm unsure about something when it comes to rendering and was hoping someone could shed some light and help me understand. I've noticed whenever doing renders in Blender that the frame rate is always low, even if settings have been lowered and the model has no textures, particles, physics etc.
Even using a good graphics card like the GTX 1080, I only get around 20fps in some renders.
I understand the process it has to go through to output a model, so it converts it to a 2D image to be displayed on screen, but why are renders so demanding on hardware?
Yet every highly detailed model that features in a game scene is no problem? I can achieve 60+ fps with settings maxed out etc.