After Cassiel meets Anton Becker and returns to Angelo's pizzeria, he meets Emit Flesti and Damiel puts his flour stained hands on Flesti's shoulder, leaving a white mark on the black suit. The next time we see Flesti, moments later, there is no white mark.
When Karl decides to dissolve his business partnership, he wades knee-deep through a flooded tunnel corridor becoming wet and filthy. Yet when he emerges from the tunnels, his pants are fluttering around too much to be wet and appear dry, and in the following scene after arriving at his destination and taking a nap, his clothes alternate between dirty and clean.
In the scene in the underground security monitoring room, as the two guards are standing and putting on their blazers, if you look at the mirror on screen right, you will see a film crew member moving around.
When Karl is lighting the old film to use it as a fuse (simulating old nitrate film which is highly flammable and known to self ignite) you can see the line of gun or flash powder underneath the film when it moves.