Product features
Theme settings > Product features holds two product page features that apply to the whole store: the size guide and the 3D model viewer.
How to set it up
Step 1: Set the default size guide
- Go to Theme settings > Product features.
- Under Size guide, choose the Default size guide page (1). It opens from every product with a size option.
- In Size option names, enter the option names the size guide link sits beside, separated by commas, such as
Size, Shoe size. - To give one product its own guide, set its
custom.size_guidepage metafield. See How to make Size Guide.

Step 2: Style the 3D model viewer
- Products with a 3D model show it in Radian's own viewer on the product page and in quick view.
- Under 3D product media, turn on Custom 3D view to show its settings: background color, background grid, exposure, model shadow and viewpoint controls.
- Turn on Use native presentation to use Shopify's default 3D viewer instead.
Settings reference
Product features
| Size guide | |
|---|---|
| Default size guide page | Used for every product. Assign a product metafield `custom.size_guide` (page reference) to override this page on a specific product. |
| Size option names | Comma-separated option names, such as Size, Shoe size. The size guide link sits beside the matching option. Products without a matching option show the link below the variant picker. |
| 3D product media | |
| Custom 3D view | Shows the customization settings for Radian's default 3D presentation. Turning this off only hides the settings and doesn't change the storefront presentation. |
| Use native presentation | Switches product pages and Quick View to Shopify's default 3D model presentation. This is the only setting that disables Radian's custom presentation; all other 3D settings below are ignored while it is enabled. |
| Background color | |
| Show background grid | Turns this on or off. |
| Exposure | Slider. |
| Show model shadow | Turns this on or off. |
| Shadow intensity | Slider. |
| Shadow softness | Slider. |
| Show viewpoint controls | Turns this on or off. |
How it works
- Turning Custom 3D view off only hides its settings. The values you set keep applying.