Method to Smooth Edge of Raster Boundary in ArcGIS Pro 2.5?

[EmmaHatcher]

I'm working to create a 3D map in ArcGIS Pro, and running into issues with the way the raster boundary is displaying.

In ArcScene 10.6.1, the layer shows up with a cleaner boundary:

In ArcGIS Pro (2.5), the layer shows up with a more pixelated edge:

Is there a method to have the raster fill a polygon boundary in a ArcGIS Pro Scene, or any other method create a smoother boundary appearance for 3D layers using Pro?

Thank you!