I have reconstructed spiral data using FIASCO which generates t-maps. I converted the t-maps to the AFNI format (using pghtoanfi), and AFNI does recognize them (and gets a range for the functional data). I know that there is activation on the t-maps because I can look at the t-maps that were generated in postscript format. If I load only the functional data (structural underlay stored in a different folder) I can see activation within the range specified. If I include the structural underlay with the functional data and then try to overlay the functional, I do not see any activation. To eliminate the obvious problem, I do have “See Function” selected. Any suggestions are appreciated.