Warning Num Samples Per Thread Reduced To 32768 Rendering Might Be Slower [repack] Now

Bring your settings down below the 32k threshold. If the image is still noisy, the problem isn't the number of samples—it's likely your light or material settings. Use Noise Thresholds: Instead of high fixed samples, use an Adaptive Seed Noise Threshold

This warning, most commonly seen in and occasionally other GPU-based renderers like

Instead of using a massive "Total Samples" count, use . Bring your settings down below the 32k threshold

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

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This warning from indicates that your scene is reaching the memory (VRAM) limit of your graphics card . Because the GPU lacks enough space to handle the full complexity of the scene, V-Ray reduces the number of samples processed per thread to avoid a complete crash, which results in longer render times. Common Causes & Fixes

Some V-Ray developers have noted this as a "log message for us" and suggest it can often be ignored if the render still completes successfully. However, if your render is noticeably sluggish or crashing, it is a sign you need to optimize. How to Fix or Optimize for the Warning If you're looking for more information on optimizing

Number of samples per thread reduced to 32,768. Rendering might be slower due to hardware stability limits.

To maximize speed, the engine allocates a high number of samples to each concurrent processing thread. However, when VRAM usage hits its ceiling, V-Ray dynamically reduces the to a bare minimum threshold—frequently exactly 32,768 . This allows the render to crawl across the finish line rather than failing instantly, but it often results in rendering speeds that are 10 to 20 times slower. Core Causes of VRAM Exhaustion Common Causes & Fixes Some V-Ray developers have

“Aris, that’s suicide for the array. And for you, if you’re standing next to it when the qubits decohere.”

The loss is worse when: