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--- wiki:sns:intactgh:faq [2024/03/04 11:40] – goldy
+++ wiki:sns:intactgh:faq [2025/09/17 13:58] (current) – goldy
@@ Line 27: / Line 27: @@
 📌 See example application [[wiki:sns:intactgh:ex_6|Ex-6: Linear Elements vs Quadratic Elements]] ++
-++2.2 How do I know what resolution/cell size to set?| \\
+++2.2 When should I use Iterative solvers vs. Direct Solver?|  \\
+\\
+  * For linear elements, the Direct Solver is recommended at a lower resolution (100-200K for 32GB RAM), and the Iterative solver at a higher resolution. \\
+  * For quadratic elements, we recommend using the Direct Solver.\\ ++
+++2.3 How do I know what resolution/cell size to set?| \\
 \\
   * To accurately capture small features with linear elements, set the cell size to 1/3 the thickness of that feature.\\
@@ Line 33: / Line 39: @@
   * Low resolutions (<100,000) will generally solve problems quickly. Intact can typically support a resolution of 10 million elements (more on powerful computers), so start small, and gradually increase the resolution until consistent results are obtained. \\
 \\
-📌 For more information see this post on [[wiki:sns:intact.gho:resolution_and_convergence|resolution and convergence]]. \\ ++
+📌 For more information see this post on [[wiki:sns:intactgh:resolution_and_convergence|resolution and convergence]]. \\ ++
-++2.3 Is there a maximum resolution (or minimum cell size)?| \\
+++2.4 Is there a maximum resolution (or minimum cell size)?| \\
 \\
   * A decent laptop/desktop should be able to support a resolution (number of elements in the grid) in order of millions. The maximum depends on your computer's memory and whether you choose to use the direct (high performance, lots of memory) or iterative (slower performance, smaller memory footprint) solver. ++
-++2.4 How do I change where my simulation saves?| \\
+++2.5 How do I change where my simulation saves?| \\
 \\
   * First, place a file path object on the Grasshopper Canvas.\\
@@ Line 46: / Line 52: @@
 ===== 3. Results and Visualization =====
-++1.1 How can I turn on/off display mesh visualization?| \\
+++3.1 How can I turn on/off display mesh visualization?| \\
 \\
   * Intact plots results using a display mesh. The result values are sampled on the mesh vertices and then linearly interpolated within the mesh facets based on the facet nodes.\\
@@ Line 53: / Line 59: @@
 {{ :wiki:sns:intactgh:display_mesh_viz.mp4?700 |}}++
+++3.2 How to create sections in the visualization using Rhino Clipping Plane?| \\
+\\
+  * Use Rhino’s `ClippingPlane` command to insert a plane that intersects the geometry you want to section.\\
+  * On the Grasshopper canvas, insert a `GUID` parameter block.\\
+  * Right-click the `GUID` block and choose “Set one GUID.” Then select the Clipping Plane object in Rhino.\\
+  * Once the GUID is linked to the Clipping Plane, the visualization should automatically update.\\
+  * The simulation geometry will be sectioned and filled accordingly, allowing clearer inspection of internal features.\\
+  * **Note:** Moving the Clipping Plane in Rhino will *not* update the sectioned geometry in Grasshopper. This is because the `GUID` block only captures the object’s identity—not its dynamic position or orientation.\\
+{{:wiki:sns:intactgh:clipping_plane_sectioning.png|}}++