Nanite Mesh Dither Opacity Mask Not Working in 5.6.0

In Unreal Engine 5.5.4, the Dither Opacity Mask option in a Masked material works correctly on Nanite meshes. However, in version 5.6.0, the dithering effect no longer applies to Nanite meshes.

1. Place both a Nanite mesh and a non-Nanite mesh in a level
2. Create a new material, set the Blend Mode to Masked, and enable the Dither Opacity Mask option
3. Set the Opacity Mask value to 0.5
4. Apply the material to both the Nanite and non-Nanite meshes in level

Results

• 5.5.4: The Dither Opacity Mask option works as expected on both meshes
• 5.6.0: The option works correctly on the non-Nanite mesh, but the Nanite mesh is affected by dithering

Expected

• The Dither Opacity Mask option should function correctly on both Nanite and non-Nanite meshes