Warning Num Samples Per Thread Reduced To 32768 Rendering Might Be Slower Jun 2026

When your GPU‑based renderer—common in engines like V‑Ray (for SketchUp, 3ds Max, etc.), OctaneRender, Redshift, or Cycles—shows this message, it is telling you that the renderer had to limit the amount of work (samples) each processing thread can handle to 32,768. In a healthy render, each thread processes many samples concurrently to build a clean, noise‑free image. When that number is capped, the engine must resort to a different, less efficient distribution of the rendering workload, which is why you are warned that the process might be slower .

[ Your Scene Assets ] ---> Exceeds Available VRAM ---> [ V-Ray Engine Safeguard ] │ (Reduces Samples per Thread) │ ▼ [ Render Completes 10x Slower ] or Cycles—shows this message