Masked Materials have become more expensive in 4.13 and internal builds than in 4.12.
Images attached for demonstration along with test map using the bush prop from starter content.
Tested with builds:
4.13 Preview 2 CL-3088355
4.14 Dev-Main CL-3092283
1. Created or use an existing masked material applied to a static mesh
2. Use the foliage tool to paint some around the level or place them manually
3. Switch to the Shader Complexity view mode
Results: Shader Complexity view shows masked materials as more expensive than in previous versions
Expected: Shader Complexity for masked materials should not be as expensive
There's no existing public thread on this issue, so head over to AnswerHub just mention UE-34873 in the post.