Overwrite Edit Mode is the default edit mode used by the Lobster application where the pixels of the 'Current Layer' will merge will the contents of the 'Previous Layer' of the image in case the image was filtered or edited in any way.Because of this behaviour,the same filter can give different results if the filter overlaps a 'Previous Layer'.Following example shows how does a filter will change if the 'Previous Layer' is merge with the 'Current Layer' using the 'Overwrite Edit Mode'.In this example,'Previous Layer' was applied the 'Invert' filter and 'Current Layer' is laid over it which is applied the 'Red Channel' filter.User can see how the 'Red Channel' filter changes its characteristics when laid over the 'Invert' filter which is visible in the 'Intersection' between the 'Invert' filter and 'Red Channel' filter.What actually has happened it that the 'Red Channel' filter when overlaps the 'Invert' also inherents the characteristics of the 'Invert' filter so the 'Intersection' looks both like 'Invert' and 'Red Channel'.

User should keep in mind that even if the sequence of applying the filter changes the user will get different results and following snaphot demonstrates this concept.In the previous example,'Invert' filter was applied and then the 'Red Channel' was applied over it.This example 'Red Channel' is applied first and then the 'Invert' filter is laid over it.The user can clearly see the big difference in both the examples.