Double-click it, set the Base to , and change the value to 10 or 15 (seconds). Reboot your computer. Conclusion
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
4K or higher textures can quickly fill VRAM. Double-click it, set the Base to , and
If the warning is accompanied by a crash, your OS might think the GPU has frozen because a single "thread" is taking too long.
If you encounter the warning frequently and it significantly impacts your render times, consider a GPU upgrade. The most cost-effective improvement is to get a card with , not necessarily more compute units. For example: It indicates that the renderer is automatically scaling
. To ensure the render doesn't crash from an "Out of Memory" error, V-Ray automatically reduces the number of samples processed per thread to fit the data into the remaining space. What This Means Performance Hit
By understanding and addressing the warning about the reduced number of samples per thread, you can optimize your rendering process to achieve the best balance between image quality and performance. If you encounter the warning frequently and it
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When your scene data—including geometry, high-resolution textures, frame buffers, and render elements—consumes nearly all available VRAM, the engine undergoes an emergency reallocation. The Significance of 32768 The number 32768 is a distinct binary limit ( 2152 to the 15th power