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

When the samples are capped, the engine cannot utilize the GPU's full "occupancy." Instead of finishing a massive chunk of work in one go, the GPU has to stop, report back to the CPU, and start a new batch of work. This "round-trip" overhead adds up, especially on complex scenes with heavy lighting or volumes, leading to noticeably longer render times. Common Causes

When a path-tracing engine renders an image, it breaks the work into "samples." To maximize the power of your GPU, the engine tries to assign a specific number of samples to each "thread" (the tiny processing units on your graphics card). When the samples are capped, the engine cannot

Understanding the "Warning: num samples per thread reduced to 32768" Error Understanding the "Warning: num samples per thread reduced

If you have set your global samples to an extremely high number (e.g., 64k or higher) without using Adaptive Sampling, the engine may attempt to push too much data through a single thread. When the samples are capped