What is CPU rendering?



The fundamentals of 3D rendering are the same regardless of the rendering software used: the CPU calculates the model's parameters according to the calculation method specified by the rendering software, including lighting, distance, blanking/occlusion, Alpha, filtering, and even paste the texture where it belongs so that the digital model is converted into a real visualization, and then the graph is produced.


The fundamentals of 3D rendering are the same regardless of the rendering software used: the CPU calculates the model's parameters according to the calculation method specified by the rendering software, including lighting, distance, blanking/occlusion, Alpha, filtering, and even paste the texture where it belongs so that the digital model is converted into a real visualization, and then the graph is produced.


So, is the graphics card or the CPU responsible for 3D rendering? Depending on the type of rendering software utilized, it's pretty easy:


Rendering programs that use traditional CPU arithmetic include V-Ray, Arnold, etc. They are programs that use the CPU to produce images, and practically all of them can support the multi-threading of the CPU, which means that the rendering efficiency increases with the number of cores. Additionally, the rendering performance has nearly doubled, and there are twice as many cores with the same frequency and cache.


For example, Octane, Redshift, RenderMan, and other GPU renderers significantly lessen their reliance on the CPU. The graphics card controls the amount of rendering efficiency in GPU rendering software.


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