Changing Mesh Colors

Optimized mesh colors can improve the visualization of statistical maps. Therefore, learning how to adjust mesh color visualization is essential for effective data presentation.

1. Launch BrainVoyager and open a VMR file along with its corresponding mesh file—for example, use the files provided in the BrainVoyager Getting Started Guide: sub-01_ses-04_T1w_IIHC_MNI.vmr and sub-01_ses-04_T1w_IIHC_MNI_WM_LH_RECOSM_INFL.srf.

   

    

2. For example, you may want to change the mesh color to grey, as functional data is often more clearly visualized against a neutral background. To do this, open the 'Meshes' menu and select 'Background and Curvature Colors'.

   

    

3. In the appearing dialog, click the 'color display and selection'  button to choose the 'Default and convex color'.
   
    

   

   
   

4. In the appearing “Color” dialog, enter the value “120” in the “Red:”, “Green:” and “Blue:” entries. Click the “OK” button to accept the new mesh color.
    

   

    

5. A mesh has two default colors; the second is used to visualize concave surface patches when curvature coloring is enabled. To change this concave curvature color to grey as well, click the corresponding color display and selection button. In the appearing 'Color' dialog, enter the value “60” in the “Red:”, “Green:” and “Blue:” entries. Click the “OK” button to accept the new concave curvature mesh color.
    

   

   

    

6. Back in the “Background and Curvature Colors” dialog change the setting to “Use two colors for convex and concave”, click the “Curvature“ button, smooth the contours with the “Smooth” button and close the dialog with “OK”. You will now see that the cortical mesh has changed its color to grey.

   

    

7. If you want to keep the grey coloring of the mesh, the mesh has to be saved. Click the “Save Mesh ” icon.