This amount can be quite large, depending on the chosen bucket size and sampling rate. Image samplers (AA) – the image sampling algorithms of V-Ray require some amount of RAM to hold all the data for the sampled image.
Render the image in several different sections and stitch the pieces in Photoshop.Use the Render to V-Ray raw image file option and then use the V-Ray raw image file viewer to convert the resulting file to a different format (see below).There are several ways to reduce this amount: Image buffer – large output resolutions require a significant amount of RAM to store the final image.leaf size, increase Face/level coefficient, or adjust the Dynamic memory limit. Adjust the raycaster params in the System rollout (reduce Max.Geometry – scenes with lots of objects and/or triangle counts require more memory to render.The following are recommendations from Chaos the developers of Vray, for reducing excessive memory usage in Vray for Rhino and Sketchup Try at least rendering a lower resolution, and if you must then work your way higher. Often you can solve problems with render times and crashing jobs by being less pushy with your final images sizes. Troubleshooting Rendering / Memory Crashes Override materials (see below): Global Switches.(Start low and work up if the image quality is not adequate) General – Preview / Very Low / Low / Medium etc