How To Create Amazing 3D Websites

1. Where to get 3D models

You can download ready-made 3D objects from these sites. Some are free, some are paid. Always check the license and make sure you have permission to use assets in commercial projects.

2. File types that work best

When you download or export models, some formats work better for 3D websites than others.

• Best formats: GLB, GLTF
• Also possible: OBJ, FBX, STL (convert these to GLB or GLTF before importing)

Why GLB — smaller files, faster loading, fewer problems in browsers.

3. Scene size: how many MB is ok

Your 3D website should load like a normal website. The bigger the scene, the longer users wait.

• Under 30 MB — ideal, fast on most phones
• 30–50 MB — acceptable, a bit slower
• 50–80 MB — heavy, may lag on weak devices
• Over 80 MB — too large for most web use

4. Polygons and triangles in simple words

Every 3D object is built from many tiny flat pieces called polygons or triangles.

More triangles give more detail, but also use more power and can create lag.

• Under 1 million triangles — ideal
• 1–3 million — ok for many scenes
• 3–5 million — heavy, use with care
• Over 5 million — too heavy for most users

Small experiences such as 3D business cards or simple product spaces can often work with 100k–600k triangles in total.

Ask yourself: will visitors really look closely at this object. If not, it does not need extreme detail.

5. Textures: how sharp is sharp enough

Textures are images wrapped on your models. Big textures and too many textures slow everything down.

• Most objects: 1024 × 1024 (1K) is enough
• Very important objects: 2048 × 2048 (2K)
• Avoid 4K textures unless absolutely needed
• Use JPG for most color textures, PNG only when you need transparency

6. Cleaning and preparing your models

Before you bring models into ALYSSIUN BUILDER, take a moment to clean them.

• Remove parts the user will never see
• Delete hidden interior faces
• Merge small pieces when you can
• Reduce the polygon count on very dense meshes
• Use simple, clean materials

Use clear names so your library stays organized:

• tree_small.glb
• office_chair_black.glb
• car_sport_red.glb

7. Build for all devices

Your 3D website should feel good not only on gaming PCs, but also on normal devices.

• Mobile phones — aim for small scenes and simple geometry
• Tablets and laptops — moderate detail, smart textures
• Desktops — can handle more detail, but still benefit from clean optimization

8. Smart design tricks

Use your detail where it matters most and keep the rest simple.

• Close to the camera → more detail and nicer textures
• Far away → low detail, soft shapes
• Background → very simple geometry or even flat shapes

Lighting

• Often one main light is enough
• Baked lighting is better for performance than many real time lights
• Use HDRI environments for soft, realistic light when possible

Audio

• Use compressed formats
• Limit how many sounds play at the same time
• Only spatialize important sounds

9. Simple workflow to follow

You can use this as your checklist every time you build a 3D website.

• 1. Download or create a 3D model
• 2. Open it in Blender, Vectary, SketchUp or similar
• 3. Clean, simplify, and set up textures
• 4. Export as GLB or GLTF
• 5. Import into ALYSSIUN BUILDER
• 6. Place and scale objects in your scene
• 7. Test on a phone and a normal laptop
• 8. If it feels slow, reduce size, polygons or textures

10. Mindset of a great builder

You are not just dropping objects into space. You are creating a feeling for real people.

• Visitors should feel that the world loads quickly
• They should feel curious and safe to move around
• They should want to stay and explore more

The best builders do not ask how much they can add. They ask what they can remove and still keep the experience powerful and emotional.

Recommended URL for this guide: alyssiun.com/builders-guide