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Since the scenes can get pretty heavy, here is a list of things that can speed up the viewport rendering.
For the cell preview:
- the nightly builds have multi-threaded drawing which can speed up the prevew 3-4 times for heavy scenes
- use the "Cells reduction" option. If you don't like the slicing effect, you must enter more odd number like 33.333
For the shading/GPU preview
- Manually set the light(s) via the "Use All Lights" Maya option or the Phoenix preview lights set. The default light is attached to the camera, which means that if you use it, the lighting will be recalculated even if you only rotate/move the camera. And this is the slowest part of the shading.
- use the "downsapling" option. If you don't have enough video memory, use this option. Even if the video card can allocate more then its physical memory, the rendering will become very very slow, no matter the other options.
- Override the shading step in the shading preview section.
For the cell preview:
- the nightly builds have multi-threaded drawing which can speed up the prevew 3-4 times for heavy scenes
- use the "Cells reduction" option. If you don't like the slicing effect, you must enter more odd number like 33.333
For the shading/GPU preview
- Manually set the light(s) via the "Use All Lights" Maya option or the Phoenix preview lights set. The default light is attached to the camera, which means that if you use it, the lighting will be recalculated even if you only rotate/move the camera. And this is the slowest part of the shading.
- use the "downsapling" option. If you don't have enough video memory, use this option. Even if the video card can allocate more then its physical memory, the rendering will become very very slow, no matter the other options.
- Override the shading step in the shading preview section.
