[Freesurfer] Multiple Comparison - Clusterwise Correction

Hi Freesurfers, More questions about this analysis. 1) Referring to the documentation, we used the following command: tksurfer fsaverage lh inflated -annot mc-z.abs.2.sig.ocn.annot -fthresh 2 -curv -gray

The documentation says we should see an image as shown in Figure 1 (attached). But what we see is Figure 2 (also attached). Can somebody explain this?

2) When running the simulation does it matter what threshold we use? For example, can we use a threshold of 2 or 3 (instead of 4 as shown in documentation) when running mri_glmfit-sim? And do we have to use the same threshold while displaying the clusters after?

Thanks for any help.

Devdutta