The following answer is based on a Twitter thread by Stefan Werner.
Volumetric rendering on the CPU can be less noisy with fewer samples, because Cycles uses equi-angular sampling. This importance sampling technique by C. Kulla and M. Fajardo is currently not implemented for GPU rendering.
The slides from the Eurographics Symposium on Rendering 2012 may ...
The following script allows you to enable all GPUs and optionally all CPUs as well.
def enable_gpus(device_type, use_cpus=False):
preferences = bpy.context.preferences
cycles_preferences = preferences.addons["cycles"].preferences
cuda_devices, opencl_devices = cycles_preferences.get_devices()
if device_type == "CUDA":
Unlike 3dview, NodeView does not have:
matrix = context.region_data.perspective_matrix
so in the callback one option is to use gpu.matrix.get_projection_matrix(), it looks something like:
def advanced_grid_xy(context, args):
geom, config = args
coords, indices = geom.coords, geom.indices
matrix = gpu.matrix.get_projection_matrix()
You need to allow Blender to use your graphics card.
Go to Edit->Preferences->System and select the card you want to use.
If there’s nothing there, you don’t have a compatible graphics card.
No worries, CPU rendering works too.
You can increase viewport speed in multiple ways.
1) Make sure you have GPU Compute on (in preferences and in render tab)
2) Adjust viewport resolution in Render Tab -> Performance -> Viewport -> Pixel size
3) Decrease Render samples in Render Tab -> Sampling -> Viewport
4) Remember that Cycles will always be considerably slower than Evee.
Settings on my ...
By coincidence, today I did a render using Blender 2.8 on a laptop with a Quadro M1000M card. No issues there, worked fine!
Quadro cards seem to be made for rendering and GFX design, so a good choice. A good read: https://www.engineering.com/DesignSoftware/DesignSoftwareArticles/ArticleID/18630/Whats-the-Difference-Between-GeForce-and-Quadro-Graphics-Cards....