Click on the Estimate Memory Usage button in RenderZone Display Options palette for an approximation of the memory required for your rendering.
Keep image map resolution as small as possible for images loaded for Materials, Billboards, Underlays, Backgrounds, etc., see Tip Here.
Minimize the use of Soft Shadows that consume memory. For information on shadows see Tip Here.
If using the Glass Accurate or Simple Glass Reflection shader do not assign a Transparency shader. The transparency shader is not needed because the transparency is controlled inside the Glass Reflection parameters. This dual transparency can cause excessive rendering time for these types of materials.
