I’ve watched many tutorials on Distance Fields in Unreal, and I’ve read the official Distance Fields page for Unreal version 5.7. I have “Generate Mesh Distance Fields” enabled. All the tutorials do the same thing, and it works. I’ve also tried doing it without the 1-x node and reducing the distance parameter. Why isn’t the cube drawing the plane?
I agree, disabling “Affect Distance Field Lighting” should fix the problem, yet I would also consider checking your current value for the Distance parameter.
Since it’s currently set at 10, the resulting gradient will be quite thin, even missable. Test by bumping the value to 50 or 100, then adjust until you get the effect you are looking for.
If the issue somehow still persists, the other chance here is that the cube is not being included in the Distance Field. To confirm that, check the Viewport settings, and enable visualization for “Global Distance Field”.