Creating a Custom Data Viewer List
First, read the Thunkable documentation on the Custom Data Viewer Layout.
For this example, I only included a single image, but other components could be added as well.
Step 1. Create a column with absolute height and width of 200, vertical and horizontal alignment of center and the Advanced property of perspective “Rotate Z” of 1.5708. Then add a single image to the column with absolute height and width of 150.
Now save the column as a data viewer layout. Wait a minute or 2 for thunkable to catch up and the layout will appear.
Create a new copy of Screen 1 (see remix below) and add a data list viewer to the Scroll Container column. Click List Item Layout and select the new custom layout. Admittedly, getting all of the rows in columns in rows in columns is complicated, but it is worth it. Most importantly, note that Scroll Row has a rotate z of -1.5708. This is where the magic occurs.
Finally set up the data source for the horizonal scrollable list (for example JSON Bound Data List Viewer - No More Cloning!)
Now you have a high performance horizonal scrolling component