Clear the z buffer before drawing notes so 3D notes aren't hidden by things in the underlay using masking.

src/NoteField.cpp

@@ -761,6 +761,10 @@ void NoteField::DrawPrimitives()
 			m_FieldRenderArgs.draw_pixels_before_targets);
 		return;
 	}
+
+	// Clear the z buffer so 3D notes aren't hidden by anything in the underlay using masking. -Kyz
+	DISPLAY->ClearZBuffer();
+
 	// Some might prefer an else block, instead of returning from the if, but I
 	// don't want to bump the indent on the entire remaining section. -Kyz
 	ArrowEffects::SetCurrentOptions(&m_pPlayerState->m_PlayerOptions.GetCurrent());