Warning Num Samples Per Thread Reduced To 32768 Rendering Might Be Slower 〈2024〉

This warning is a specific performance message generated by the rendering engine (developed by ), typically when using GPU rendering (CUDA or RTX engines). Warning Meaning This message indicates that V-Ray has hit a memory (VRAM) ceiling on your graphics card. Chaos Forums

. You are asking the machine to do "brute force" work rather than "smart" work. Lower the Global Max Samples:

10. Related Warnings & Errors

You may also encounter these similar messages: This warning is a specific performance message generated

: Close other GPU-heavy software like Substance Painter, Photoshop, or Chrome to free up memory for your renderer. SketchUp Community

8. Step-by-Step Troubleshooting Checklist

If you see the warning and want to maximize performance: The engine signals a guardrail: threads will no

If you're looking for more information on optimizing rendering performance or addressing specific issues related to this warning, check out the following resources:

: Ensure other GPU-intensive applications (like web browsers or other 3D software) are closed to free up VRAM for the render engine. Chaos Forums Diagnostic Check spread work over more passes

• The engine signals a guardrail: threads will no longer spawn an unlimited swarm of samples. This keeps memory, stack, and GPU/CPU resources under control.
• The method of work adaptively changes: to meet quality targets you once achieved with fewer constraints, the renderer must either increase the number of active threads, spread work over more passes, or accept longer wall-clock time.

Solution: Close all unnecessary applications before starting your render.