When displaying the image, it looks grainy and noisy at first, but it gradually improves, as the rendering engine performs the computations and calculates the additional samples. By default, AMD Radeon™ ProRender processes all pixels in the image for calculating the samples. The larger number of samples for a pixel is what provides the best results, but it requires more time for calculation of the colors. The image is rendered gradually: as new samples are received, the quality of the image gets better, and the amount of noise decreases. As new sample values for a pixel are added, the sampling results are averaged in order to calculate the color of the pixel. To render an image, AMD Radeon™ ProRender creates a certain number of ray samples for each pixel. The Render Samples setting is the major factor defining the quality of the rendered image. A higher resolution can be useful for printing and for large screens, while a lower resolution is suitable for publishing online and viewing on smaller screens. You should choose the resolution that best suits your needs, taking into account the limitation of resources. This parameter is important while setting up the rendering engine, because it impacts the quality of the rendered image and its usage. However, rendering an image with higher resolution also requires more time and resources. The higher the resolution, the more detailed the rendered image will be. It functions as two numbers, for instance, 1920 × 1080, where 1920 is the width (the horizontal resolution) and 1080 is the height (the vertical resolution). The resolution defines the number of pixels in the image distributed horizontally and vertically. Resolution controls allow you to either choose one of the predefined dimensions of the image or to set the image width and height manually. Here you can choose the camera with the view that you want to render. The Camera drop-down list contains all cameras available in the current project. Keep in mind that, in most cases, you will only achieve the maximum speedup of the rendering process by using the graphics accelerator (GPU), since it is designed specifically for handling complex graphics calculations. If you own a processor with numerous cores and threads, you can experiment with this parameter to find the best value for your system and your project. Increasing the number of threads can speed up the process of rendering with the CPU, but it can also affect the performance and stability of the system and the use of resources. The maximum number of threads is defined by the model and characteristics of your CPU, the total number of the processor cores and threads, the level of complexity and size of the project that you are rendering. It defines the number of the processor cores that are going to be used for handling the tasks of the rendering engine, when GPU is untapped or when CPU is used along with GPU for the sake of speeding up the process. The CPU Threads parameter deals with the number of processing threads on the central processor (CPU) that will be involved in the rendering. It is worth noting that it is normal to find only one available device for rendering in this list, as it will be the case for most users. The first category that you encounter in the opened window is Render Devices, which lists the available devices for rendering, i.e. The default settings of AMD Radeon™ ProRender in Live Home 3D for Mac.
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