Warning Num Samples Per Thread Reduced To 32768 Rendering Might Be Slower [extra Quality]

Applications like web browsers (Chrome), Photoshop, or Substance Painter can occupy several gigabytes of VRAM.

❌ No — it's a normal protective measure, not a hardware error. It indicates that the renderer is automatically scaling

The warning typically appears in V-Ray when your scene's complexity is pushing your GPU to its memory limit . It indicates that the renderer is automatically scaling back its internal "work chunks" to fit within the available Video RAM (VRAM) , which prevents a crash but significantly slows down the process. Why This is Happening Lower Resolution during Testing : Reduce the output

: This setting loads only the required texture resolutions based on their distance from the camera, significantly saving memory. Use V-Ray Proxies : Convert heavy geometry into V-Ray Proxies to reduce the initial memory footprint. Lower Resolution during Testing : Reduce the output resolution in your Render Settings to see if the warning persists. Enable Hardware-Accelerated GPU Scheduling Applications like web browsers (Chrome)