Hi @wildbellsart 
Easify Box Builder fully supports your Mix & Match “gallery wall” needs, allowing customers to choose prints only from a specific group (e.g., Pug prints), select exactly 3, 6, or 8 prints, and have a clear fixed bundle price/discount applied—without confusing shoppers.
Here’s an example I’ve created so you can see how it works:
Easify Box Builder currently offers 4 box types to choose from (Regular Box, Fixed Box Price, Tiered Quantity Discounts, and Predefined Box Sizes). However, for your use case, the best fit is Predefined Box Sizes
Next, set up preset options such as 3 prints, 6 prints, or 8 prints, each with its corresponding price. When customers choose a box size, the system will automatically limit the number of artworks to match the selected print count, making the shopping experience clear and intuitive.
In the section below, you can display only the list of Pug prints (or any specific collection) instead of your entire catalog. Customers can increase or decrease the quantity of each artwork using the +/– buttons, and Easify will automatically track the total number of prints selected to ensure it doesn’t exceed the box limit.
For pricing, in Pricing & Discounts, you simply enter the total number of items for each box (3, 6, or 8) along with your desired bundle price. This price will be clearly shown as soon as customers select a box size, so they can instantly see the value of buying the bundle versus purchasing items individually.
This entire setup requires no coding and is especially beginner-friendly. You can build a complete gallery wall in just a few minutes while keeping full control over the product list, selection limits, and pricing in a clean, organized way.
Built for ease of use, Easify Box Builder allows anyone to complete the setup quickly through a clear, intuitive interface, without requiring technical skills.