I have just finished painting a wall with Dulux Rich Matt white paint, using a roller. I painted from ceiling to floor in 2-3 roller width sections and finished each section by back-rolling with continuous floor to ceiling strokes. Each section slightly overlapped the preceding section. I am pleased with the finish although when I place a lamp at one end of the wall and look along it from the other end I can see vertical lines where the paint slightly overlapped between sections.
What I'd like to know is - is this avoidable? I think my technique is OK and I seemed to be keeping a wet edge at all times. Maybe a different type of paint would help? My wife thinks I'm mad because it looks great apart from when the light is shining at a shallow angle, but I just want to do a good job. If the overlap marks are always going to be visible under these circumstances, then fine, I will happily move on and finish the room but I'd like to know if anyone knows how to avoid this. Maybe I'm just too fussy?