How to reduce model file size in Blender?

BlenderKit models are meant to be used in complex scenes and our users also love to export them into game engines. So in our case, size actually matters.

Additionally, if your file size is too big, your viewport may get stuck, or you may run out of memory with the Cycles renderer.

This article will explain how to reduce the file size of your models.

Subdivision surface modelling

When using subdivision surface modeling, never apply the subdivision surface modifier. Keep the viewport resolution as low as possible for real-time editing. Also, keep the render resolution just right for smooth shapes, but never go higher than needed.

Don't also apply the multiresolution modifier- keep it or bake your maps to the lowest possible resolution and then use subdivision surface modifier with displacement modifier to keep the detail.

Starting with high poly models like scans or dyntopo meshes?

Use Decimate modifier and bake normal maps.

Textures and materials

High-resolution textures are welcome since BlenderKit server generates lower resolutions from them and sometimes you just need the extra resolution for the best detail. Modern game engines can also deal with high resolution textures and take care of the detail. However, don't use a 4k texture for a spoon or a cup.

Don't use many materials on a single model/object. Always make unique UV maps and PBR image sets in a suitable app. PBR material system can combine many materials in just a few texture maps.

Thanks and hope life just got lighter!

See next articles

Inverted normals

The quickest way to fix it in Blender

Brush Preview

No need to be special

Why are not all HDRs accepted?

Only the best for our artists

Upload real HDRs

Low range HDRs aren't really HDRs

How to improve scene composition?

It's all about the details

Add cameras to your scene

The more the merrier

Unclear scenes

Give your 3D scene purpose

Insufficient quality of uploaded asset

We all have to start somewhere

Asset fixed during validation

Sometimes miracles happen

How to improve thumbnail quality?

Great assets deserve great thumbnails

OpenGL vs DirectX normal maps

Open minds open hearts

How to name and describe assets?

The way to get better search results

Missing profile info

Every creator needs a profile

Upload looks like a test

Testing is awesome when it’s privet

Tiling textures

Visible tilling versus tileable textures

Unfinished asset

It's not over till it's over

Incorrect upload

Always test download your assets

Asset is too similar to previous upload

Just changing the color isn't enough

Duplicate asset

This never ends well

Disconnected nodes

How to fix them?

Nodes spaghetti

We prefer chocolate

Tutorial result models

Enough with the donuts

Material too simple

Let's make it better

IOR in materials

Let’s work it out

Subsurface scattering radius

Understanding SSS in Blender

Unconventional Thumbnails

Use standard BlenderKit previews for materials

Material PBR setup

How to do it right?

Wood mapping

How to do it?

How to reduce model file size in Blender?

Great tips to make life lighter

Manufacturer and designer tags

Don’t forget about them

Model Topology Issues

Why have issues?

Where are my textures?

Understanding why textures are missing from your file

Cycles / EEVEE systems

The way to improve materials

Why applying scale (and rotation) matters?

So many reasons to apply scale in Blender

Model unrealistic shape

The shape/proportions of the of the object aren't realistic. Check reference pictures to study more the real shape of this object.

Combining multiple assets

When to upload models separately and when to upload a composition?

Unrealistic texture size

How to correct it?

Models without materials

Not at our library

Authorship verification

How to prove your cool stuff is truly yours?

Put the model on the ground

How to position your model?

How important are good tags?

If you want your assets to be found, invest into tags

Original designs

Advantages and disadvantages of uploading original interior design models

Texel density in Blender

How to set it up accurately?

No AI Assets

Say no to AI, Stand with Artists