Step 1. First render
1.1. Open the scene (which can be found here).
1.2. Assign V-Ray as the current renderer.
Since the default V-Ray settings are not very well suited for a fast initial preview, we'll make a few quik adjustments before the first render.
1.3. Chek the Override mtl option in the Global switches rollout, clik the button next to it and select a default VRayMtl material.
1.4. Set the Image sampler type to Fixed.
1.5. Set the resolution to 400 x 325.
1.6. Set the Region size in the System rollout to 32 x 32 pixels.
1.7. Optionally, you can turn on the Frame stamp to print the render time on the image.
1.8. Render the scene: