# What is Visual Coding?

Custom AR markers are AR markers that are in the form of customized graphics or visuals.

{% embed url="<https://youtu.be/YpwOecJytGk>" %}

This includes any graphic designs—including book covers, posters, invitations, sticker designs, t-shirt designs, and more. Basically, anything with a design will fit as a custom AR marker!

To pop up AR contents above custom AR markers, you can simply scan the markers with Assemblr Studio mobile app or even on your web browser.

## What Is an Ideal Custom AR Marker Like?

<figure><img src="https://2907211835-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F5W1YRfnpcVKUd01ArKDB%2Fuploads%2FY3gPDMuzXXTlMdZtAOlj%2Fmarker-github.jpg?alt=media&#x26;token=dfa16196-f52d-4567-aead-ad7259dabfc8" alt=""><figcaption></figcaption></figure>

### **Rich details**

Your marker should have a **unique graphic**. This means you can include **visuals and even texts**. Some of the good examples will be groups of people, mixtures of items, and street scenes. However, while these are good, make sure that there’s no repetitive pattern!

### **Great in contrast**

The color also contributes to your marker. If your graphic includes **bright and dark colors**, they’ll simply work well as a custom AR marker.

### **Proper format & size**

When saving your custom AR marker, it must be saved in **8- or 24-bit PNG and JPG formats.** Make sure to also save it **less than 2 MB** in size, and the **JPGs must be RGB or grayscale**.

### **Appropriate surface & materials**

If your graphic—or in this case, custom AR marker—will be printed later, make sure to **not use glossy papers as the materials**. They might reflect lights—and this will be a main reason why your AR is flickery.

Also, if you happen to attach it somewhere, please stick it on a flat surface to be able to detect better. Don’t let it be on a curved or bendy one.&#x20;