Memsaver is able to reduce texture sizes on objects that end up being small in the final render. This reduces VRAM consumption and makes it a very helpful tool for big projects or if your hardware is limiting.
More Info - http://blendermarket.com/products/memsaver-scene-memory-optimizer
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Blender addons Blender – Memsaver Memory Optimizer Vram Saver Unity or Unreal Engine-ready resources to enhance your game design process. We understand the importance of having right tools at your disposal, which is why we've curated a diverse selection of assets to cater to every genre and style