Your lookup table only contains indices between 0 to 6. In any case I would not use look up table to display negative scales. Have you tried any other color maps like JET or NIH which has more colors?

Ruopeng

On Apr 6, 2020, at 6:30 AM, Peng Liu <claudialiu1120@gmail.com> wrote:

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Dear Freesurfer experts,

I am trying to customize a colour map of my own, with five colours and scale from -12.5 to 12.5, since when using Heat (with default options), the scale is correct but it is shown in only four colours.

However after I created the .lut file (attached below), when loading it into freeview, the colour scale is from 0 to 6.

<image.png>

Does this mean I should also include scale information in the .lut file?

Any help would be much appreciated.

Peng Liu
<Map.lut>_______________________________________________
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