Masks are complex things.
BMP18074-001BMP18074-002BMP18074-003BMP18074-004BMP18074-005BMP18074-006BMP18074-007BMP18074-008BMP18074-009BMP18074-010BMP18074-011BMP18074-012BMP18074-013BMP18074-014BMP18074-015BMP18074-016BMP18074-017BMP18074-018BMP18074-019BMP18074-020