Hi @ForrestStreeter,
If I'm following correctly, you've applied effects to a basemap in Map Viewer. You are correct, those effects are visible in Map Viewer, but not Map Viewer Classic. Classic is built on an older API and is not capable of rendering effects.
If you'd like to save a copy of the basemap with the settings you've applied, one suggestion I have is save it in a Group Layer. To get started,
In the Basemap Pane,
- Click to drill into the basemap
- Click the options to the right of the basemap layer name
- Select Move from Basemap
The basemap layer should appear in the layers pane. In the Layers Pane,
- Click the options to the right of the basemap layer name
- Select Group
- Click the options to the right of the Group layer name
- Save the Group Layer
This will allow you to save and re-use the Group Layer. When you add the Group Layer to other maps in Map Viewer, the settings you configured, such as effects, are preserved.