Logan, the newest and darkest entry in the X-Men franchise, features some of the most intense effects in the whole series (given the film's R-rating, the violence was a good deal more grizzly). In total, Australian VFX house Rising Sun Pictures contributed 230 shots to the film, and they've just released an awesome video that shows some of their behind-the-scenes work on the film.
According to Rising Sun's VFX Supervisor Dennis Jones, “Logan’s R-rating was confirmed from the start...That introduced another dynamic to play with. We could work with less restraint regarding things like blood and claw penetration.”
"We could work with less restraint regarding things like blood and claw penetration.” —Dennis Jones
Other work contributed by Rising Sun included "reposition[ing] Logan’s arms, fists and claws to suit the composition and timing of the shot," as well as digital matte paintings of backgrounds and sky in Texas and Mexico. Their work, along with that of other houses, contributed to a seamless whole that is rapidly becoming the norm in movies, whether we know it (or not).
Source: Rising Sun Pictures