The file size has now reduced to a small 1.4Mb this is a HUGE reduction with no difference in the appearance of the sphere.įor no other reason other than I’m a nerd when it comes to stats I wanted to satisfy my curiosity and find out if it is a linear relationship between poly count and file size. If I go ahead and retopologize this model using the really simple Zbrush plugin Decimation Master I can get it 20k polys. When I export this to OBJ the file size is 426 Mb!!! I used OBJ as it generally only stores the model and no additional info that other file types do such as FBX. To give some context the below sphere has approximately 6 million polys. It is amazing how quickly the poly count can skyrocket. With Zbrush it is surprisingly easy to get carried away with tools such as Dynamesh, Subdividing and my personal favourite Sculptris. The more triangles you use typically allows you to add more detail or smooth models. Polys also referred to as polygons are the triangles that make up the model. What Causes Large FilesĪs I have already mentioned the number of polys dictates the file size.

While it may be easy to say to reduce your poly count in practice this can actually be somewhat of a complex task. This can be reduced by using tactics like retopology and texture maps such as normal & displacement maps. The more polygons there are the larger the file. The file size of Zbrush models has a direct correlation with the amount of polygons the model has. The problem you will quickly run into is when you export the model and are floored but a crazy file size of upwards of a GB. The best thing about Zbrush is the freedom it gives to simply sculpt and get some really clean detailed models.

How to make gmod file size smaller