fb862d082a
Cycles uses multiple threads to send commands to the GPU. The current command buffer structure assumed that all commands from the same context were send via the same thread. This wasn't the case and could lead to recording commands to command buffers that are still pending (preparing commands to send to GPU). This is fixed by creating a command buffer each time a render graph submits its work. Detected when researching #128608 Pull Request: https://projects.blender.org/blender/blender/pulls/128978
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