SceneKit PBR - photorealism

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Is it possible to get same level of photorealism with SceneKit as Unreal Engine 4? What are some examples of photorealism on SceneKit or Metal2?

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Is it possible to get same level of photorealism with SceneKit as Unreal Engine 4?

No.

Some will say this is subjective. No. Photorealism and its degrees aren't subjective.

Some will say "it depends" and list off many criteria that favour the idea that this might be the case. It's not. Pound for pound, cycle for cycle, Unreal engine is in an entirely different league of 3D rendering quality, functionality, performance and features.

When it comes to the volume of users, shader support and experimentation, pace of development, exploration of rendering technologies and all other contributing factors, Unreal engine is an order of magnitude better off.

More importantly, Unreal engine is open source, and those above users and their specialists have defined, refined and iterated upon what the engine can do, and will continue improving it. This continuous cycle of improvement will never be caught by Scene Kit.