Warning Num Samples Per Thread Reduced To 32768 Rendering Might Be Slower -

If you set your global render sample count excessively high (e.g., 50,000+ samples) without using adaptive sampling, the engine divides these samples across available GPU threads. If the scene geometry is simple but the sample count is massive, individual threads get overloaded past the 32,768 threshold. 3. Progressive Rendering Overheads

Downscale textures that don’t need high resolution (e.g., B. Adjust Render Settings

High-resolution renders (like 4K) require larger internal buffers, which consume more VRAM and can trigger the reduction. How to Fix It If you set your global render sample count

Older NVIDIA drivers have lower thresholds for thread allocation.

If this feature is for a GUI application, the warning should be handled via a signal slot connection to update the interface without crashing the render thread. If this feature is for a GUI application,

The warning message indicates that the rendering engine has automatically reduced the number of samples per thread to 32768. This reduction is a safeguard to prevent potential performance issues or crashes. The "num samples per thread" refers to the number of samples taken by each thread during the rendering process. Samples are essentially data points used to generate the final image. When the number of samples per thread exceeds 32768, the rendering engine may encounter difficulties in processing the data efficiently, leading to performance degradation or instability.

This warning typically appears in (for Rhino, SketchUp, 3ds Max, etc.) when your GPU is reaching its memory capacity. What it Means SketchUp Community Immediate Solutions

You may have set your maximum samples too high for the complexity of the scene OctaneRender Forums.

) is often the lower limit the software sets before performance drops off significantly. SketchUp Community Immediate Solutions