While using a lower poly version may result in a reduction to render times, the process of retopology is slow and tedious, so its benefits of it are negated. For example, if you are creating objects for simple image rendering, there may not be much point in retopologizing the model to a lower form.
The idea is to take a high poly version of an object and convert it into a lower poly version of the model, often without the reduction of detail on the model’s surface. If you are new to 3D modeling, then you may be unaware of the process of retopologizing your model. This helps as it is one of the less enjoyable aspects of being a 3D artist. If you can learn to use the shrinkwrap modifier effectively, you can significantly reduce the time spent on the retopology phase. Then using the shrinkwrap modifier, the mesh will wrap itself around the object’s surface and is particularly effective if the high poly has poor topology. This involves taking a basic shape and scaling it up to appear larger than the higher poly mesh. One of the fastest methods of retopology is to use the shrinkwrap modifier. When creating objects for video games, the traditional process involves creating high poly models for our designs first before creating a low poly version using a form of retopology and then using the baking tools to map those high poly details onto the low poly version of the model. Blender Tutorial - How And Why We Apply Our Transforms
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