That’s right. The .trk files generated by AnatomiCuts have a color tag saved in a private location in the header, as I remember now. I think it is only effective when loaded as tract cluster. Are you going to write .trk files by yourself? If so I can point you to where to write the color bytes in the header.
On Jan 6, 2021, at 2:17 PM, Pietro Astolfi <pasto...@fbk.eu<mailto:pasto...@fbk.eu>> wrote: External Email - Use Caution Hi Ruopeng, thanks for the reply. Actually, I’m not really interested in using AnatomiCuts, but since I tried it I wanted to signal the error. Concerning the embedded colors in FreeView, I was thinking they were value inserted as `data_per_streamlines` inside the .trk file, which is something possible. Also, by looking at the gif image of <https://secure-web.cisco.com/1bCTmdHOhpmCAVqsfY7cH5W2KiZubfIX_xThDXmmjn90Re5GNRsFK91P0ow-PzO6Oi_cHEL8EZs-5m-Rrxaxayro1MfLELnf4eCWGVwQoc8GivhGn5doq5n93oCZ9Q9kRPcwFB0mVz3Riv8wBv8M8JBEsNd7Vtod42yO56ToDf-0K3VKRWeiy4ND5ObI5eCOx7ZdqVGm0W2Pj43FHe9HhSIQ_lxyHm71UDE4oF4O38kYB6AzxQO37GIXVZuop94zQKBrGlEnXocuG8g7Aq---LA/https%3A%2F%2Fsurfer.nmr.mgh.harvard.edu%2Ffswiki%2FAnatomiCuts%23VisualizingAnatomiCutsinFreeview> this<https://secure-web.cisco.com/1bCTmdHOhpmCAVqsfY7cH5W2KiZubfIX_xThDXmmjn90Re5GNRsFK91P0ow-PzO6Oi_cHEL8EZs-5m-Rrxaxayro1MfLELnf4eCWGVwQoc8GivhGn5doq5n93oCZ9Q9kRPcwFB0mVz3Riv8wBv8M8JBEsNd7Vtod42yO56ToDf-0K3VKRWeiy4ND5ObI5eCOx7ZdqVGm0W2Pj43FHe9HhSIQ_lxyHm71UDE4oF4O38kYB6AzxQO37GIXVZuop94zQKBrGlEnXocuG8g7Aq---LA/https%3A%2F%2Fsurfer.nmr.mgh.harvard.edu%2Ffswiki%2FAnatomiCuts%23VisualizingAnatomiCutsinFreeview> tutorial of AnatomiCuts it seems the embedded colors are intrinsic of the tracts loaded as .trk. Best, Pietro Pietro Astolfi PhD student ICT school - University of Trento NILab - Bruno Kessler Foundation PAVIS - Italian Institute of Technology Il giorno 06 gen 2021, alle ore 18:24, Wang, Ruopeng <rwa...@mgh.harvard.edu<mailto:rwa...@mgh.harvard.edu>> ha scritto: Hi Pietro, I’m not familiar with AnatomiCuts so I can’t answer that part of your question. For visualizing tracts, freeview can load .trk files generated by TrackVis/DTK. They do not support embedded colors. It can also load tract volumes in 4D mgz format, which do support embedded colors. Best, Ruopeng On Jan 5, 2021, at 6:32 PM, Pietro Astolfi <pasto...@fbk.eu<mailto:pasto...@fbk.eu>> wrote: External Email - Use Caution Hi, In the last days I searched for documentation about the use of embedded colors when visualizing tracts in freeview. I wasn’ t able to find any information online. I also tried to obtain a tract containing the embdedd colors information by using `dmri_AnatomiCuts` (both with fs 7.1.0 on OS X and dev version on Ubuntu ), but despite many trials I always got the same runtime error: terminating with uncaught exception of type std::runtime_error: Gak! Abort trap: 6 If anyone could help me it would be very appreciated, Best, Pietro Pietro Astolfi PhD student ICT school - University of Trento NILab - Bruno Kessler Foundation PAVIS - Italian Institute of Technology -- Le informazioni contenute nella presente comunicazione sono di natura privata e come tali sono da considerarsi riservate ed indirizzate esclusivamente ai destinatari indicati e per le finalità strettamente legate al relativo contenuto. 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