The Running Projection tool can be used to quickly combine information from multiple Z Sections. You may choose to average all of the sections in to one, which will give you an approximation of a volume rendering of the image looking directly down the Z axis.
You can use this text field to indicate how many sections to move ahead from the first section in one averaged group to the first section in the next averaged group. So if you selected step size of 4, regardless of how many sections are grouped into one projection, if your starting z was 0, your groups would start at sections 0, 4, 8, ... etc.
You can use this text field to indicate how many input sections to average for each output section. If this number is 3 for example, and your starting z was zero then your input sections 0-2 will be combined to create the first output section, if your step size was also 3 then sections 3-5 will be combined to create the second output section, but if your step size was 2 then 2-4 would be combined to create the second section
Specifies the method used to combine the sections:
Sum simply adds the intensity of each pixel to create the output values. Be careful when using this option. If the output intensity values are too large for the output data type specified, the output image will look strange due to saturation (see I/O and Region topic Data Type for further explanation).
Average does a simple average of the input data values to create the output image.
Max Intensity uses the largest intensity value of all the input intensities to create an output value. This method may give you the most realistic impression of a volume rendered image, especially when combining all of the images in the input data set.