Today I came across a perplexing issue when working on applying a BlurFilter to a Movie Clip in a Flash Application. When working with a large container object for a scrolling gallery I found that the BlurFilter I was trying to apply was not being rendered. After some testing and research it appears that Bitmaps have a max height and width of 2880 pixels. This limit was causing the BlurFilter to not render.
If you find that filters aren’t working on your Display Objects it may be that your object exceeds the max dimensions of 2880×2880.