I’ve been working on MRI scans of a mouse cortex (I know this might sound weird, but this is for work!).
The cortex of a mouse is smooth (unlike the human one) and it is therefore important to keep it smooth.
The cortex has been segmented in several sub-regions using Slicer3D and the sub-volumes have been exported as Obj files in Blender. So far, so good, except that the file was HUGE (800 MB).
I simplified the meshs by using the decimate modifier, then used the smooth Vertex tool to get a smaller file (~50 MB). I did just a bit of additional smoothing in scult mode to get something real smooth!
I am mostly happy with the result I obtained, except that some “cracks” have appeared between my cortical regions. so, the cortex does not look smooth anymore, but it sort of look deconvolute and start resembling a human brain (well, sort of!). This is because the edges of my cortical regions are not sharp anymore.
I’ve tried many things to smooth the surface of the cortical regions, without affecting their edges, but nothing so far has worked.
Any ideas on how to proceed?
I have attached 2 pictures. the first one shows the original cortex (top view) with the cortical subregions (red lines), the the result of the decimate + smooth vertex steps, see the cracks appearing. The second file the result of the smooth in scult mode… with these cracks between regions increasing in size.
Thanks in advance for your help!