End result does not have a mask I Was watching "How to make a Lightsaber in Blender | The easy way" where it taught me how to make a lightsaber using a mask. Towards the end of the video,I clicked render animation and when i checked my output file, the pictures had no mask around them.
I used a image sequence. 

My render result is this
Possible solutions:


Make sure you have your mask selected from the drop-down in the Mask node
Make sure your output is not only connected to the Viewer node but also to the Composite node output. Ensure that "Use Nodes" at the bottom of the Node editor is checked.
Make sure the mask layer you are using is enabled to render


Please update with more information if this does not solve your problem.