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--- 3d_modeling:meshmixer:clean_up_3d_scan [2020/03/25 07:26] – created formlab
+++ 3d_modeling:meshmixer:clean_up_3d_scan [2021/10/13 00:22] – formlab
@@ Line 1: / Line 1: @@
-====== Clean up a 3D scan ======
+====== Clean up a 3D scan made with the Occipital Structure scanner ======
+The 3D files from the Structure scanner often have holes and unwanted geometry. After following this guide you'll get a watertight model that is ready for (colour) 3D printing. A basic understanding of mesh manipulation in Blender is necessary.
+This guide uses Meshmixer, but here is a [[3d_modeling:blender:clean_up_occipital_3d_scan|guide]] that describes this process for Blender.
+===== Open the file =====
+The structure scanner delivers the 3D object in 3 parts:
+  - ''Model.obj'' is the 3D object
+  - ''Model.jpg'' is the texture file
+  - ''Model.mtl'' is a file that links the object to the texture.
+You only have to open the ''.obj'' file. The program will find the other files on its own:
+  - Click 'Import' and select the ''.obj'' file. Alternatively go to ''File > Import''.
+=== Prepare model ===
+  - Orient the model upright: ''Edit > Transform''.
+  - Cut away unwanted geometry: ''Edit > Plane Cut''.
+{{:3d_modeling:meshmixer:meshmixer_occipital_cleanup_01_import-and-cut_arrows.jpg|}}
+=== Join disconnected sections ===
+Objects from the structure scanner come in overlapping parts. This might cause problems for 3D printing.
+  - Join the disconnected sections (blue lines indicate boundaries): ''Edit > Close Cracks''.
+{{:3d_modeling:meshmixer:meshmixer_occipital_cleanup_02_close_cracks_arrows.jpg|}}
+=== Delete loose parts ===
+  - In ''Select'' mode, click anywhere on the part you want to keep.
+  - Expand the selection to all connected vertices: ''e''.
+  - Invert the selection: ''i''.
+  - Delete the loose parts: ''x''.
+{{:3d_modeling:meshmixer:meshmixer_occipital_cleanup_03_delete-loose_arrows.jpg|}}
+  - Save your project(!)
+=== Make the model 3D print ready ===
+  - Make the mesh solid: ''Edit > Make Solid''.
+      - Set the solid type to ''Accurate''
+      - Increase Solid Accuracy and Mesh Density until you're happy with the result. Press Accept.
+{{:3d_modeling:meshmixer:meshmixer_occipital_cleanup_04_make-solid_arrows.jpg|}}