This is the template for the filename that will be used for opening files. The % character(s) will be replaced with a zero filled number in the range specified. For example, if the Basename were 'abc%%%def'; start = 0; stop = 5; step = 2, then the files abc000def, abc002def, abc004def would be read and composed into a lattice.
If the number of positions to fill is too small, it will be expanded. For example, if the Basename were 'abc%def'; start = 0; stop = 20; step = 10, then the files abc0def, abc10def,abc20def would be read.
The starting number for composing the filenames
The ending number for composing the filenames
The step for composing the filenames
This is the output lattice which is the 2D images stacked together.