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--- appwiki:blender3d [2022/09/02 06:19] – [Material and Shader in Blender 3D] ying
+++ appwiki:blender3d [2023/12/08 04:06] (current) – [Interface] ying
@@ Line 19: / Line 19: @@
 </code>
   * restart blender, you should be able to call “from PySide2 import QtWidgets,QtCore,QtGui” without issue
+====== Common Task in Blender ======
+**set camera clipping distance**
+  - viewport, press N, to bring up tool panel, in View tab, set the far clip distance
 ====== Blender Shortcut ======
@@ Line 48: / Line 53: @@
 | paint select | c | |
 | soft select | o | |
-| obj/vtx,edge,face mode | tab,ctrl+tab | RMB markmenu, script |
+| obj/vtx,edge,face mode | tab,<del>ctrl+tab</del>1,2,3 | RMB markmenu, script |
 | hide operate axis handle | ctrl+space | q |
@@ Line 128: / Line 133: @@
   * display vertex count: viewport overlay icon on View3D, check statistics
     * for show selected vertex count: select object, shift+h to hide other, view count, then alt+h/undo to show all
+===== Interface =====
+**show selected vertex count and vertex count**
+  * go Preference Interface > Status Bar : check Scene statistics,
+  * then at bottom it shows statistc \\ {{:appwiki:blender3d:blender_btm_statistics.png|}}
+**show vertex index**
+  * go Preference > Interface > Display : Developer Extra checked
+  * go viewport option > Developer : check Indice
 ===== Layout in Blender 3D =====
@@ Line 157: / Line 172: @@
   * in Outliner, choce Blender File instead Scene in 2nd dropdown, you can see the tree of blend data structure, all materials currently there is under Material tree node.
   * **in short**, if you want keep your shader network builds, you need to assign them to something to hold reference to them
+  * also, you can't reuse nodes directly cross different materials, you need to select nodes and create Node Group
+    * Group nodes will be shown in shade edit Add menu>Group> yourGroupNode
 ===== UV unwrap in Blender 3D =====
@@ Line 187: / Line 205: @@
-====== Plugins ======
+====== Addon Plugins ======
+  * save selected as
+    * https://github.com/Tilapiatsu/blender-export_as_blend
   * Text FX: http://codeofart.com/text-fx/
+    * https://codeofart.gumroad.com/l/Animax
+  * layout manager:
+    * (free) Workspace Manager for Blender
+      * https://tingjoybits.gumroad.com/l/yyoghm?layout=profile
+    * (paid) Layout Manager
+      * https://blendermarket.com/products/layout-manager
 ====== Blender Automation ======
@@ Line 216: / Line 242: @@
 </code>
+====== Blender Research ======
+===== Vertex density check =====
+  * (most useful) https://blender.stackexchange.com/questions/90992/is-there-a-way-to-compute-vertex-density
+  * (useful) Blender 2.76 Overview: Point Density : https://www.youtube.com/watch?v=ESZsWNCfpPU
+  * http://builder.openhmd.net/blender-hmd-viewport-temp/render/cycles/nodes/types/textures/point_density.html
+  * https://blender.stackexchange.com/questions/243289/how-to-combine-vertex-groups-and-texture-as-density-map-in-geometry-nodes
+  * Blender 2.74: Point Density Texture in Cycles: https://www.youtube.com/watch?v=9FV03stf6X0
+  * https://blender.stackexchange.com/questions/62505/point-density-doesnt-render
+  * Blender Tutorial - Point density based pattern: https://www.youtube.com/watch?v=KogFovV-QoA
+  * https://blenderartists.org/t/point-density-particles-not-rendering-when-object-is-big/681320
+  * Datamap Visualization in Blender 3.0 Geometrynodes: https://www.youtube.com/watch?v=uwCCCR_BLdQ
+  * basically, use point density node in material setup to show the point density info as color
+    * (**first**), go Render setting tab, change render from Eevee render to Cycle CPU render
+    * use object vertex as info to fit the object per material, and assign that material to that object
+    * radius is vertex search radius, which decide how the density amount calculated
+    * resolution is actual dot render, 100 is 100x100 pixel render for each dot. dont need so high res sharp dots, as they will blend together
+{{:appwiki:blender3d:blender_density_map_setup.png|}}
+===== Blender Material Concept =====
+  * You can view material list in > Outliner [data api view]
+  * You can check per object material usage case in > Outliner [scene view], expand the object arrow
+    * You can also check per object material usage case in > Material tab panel (object selection required)
+  * You can swith/edit object material in > Shader Editor (shift F3)
+    * object selection required
+    * if object is not assigned to any material, a New button is there instead
+  * In viewport, you can view material on object as result of (Preview material view) or (render material view)
+    * note, the (render material view) is linked to the > Render tab setting
+    * some material like Point Density can only be used in Cycle CPU render setting, so make sure Render tab is set properly for the render material view to work
+    * the default render preview is from Eevee GPU render.
+{{:appwiki:blender3d:blender_material_concept_publish.png|}}
+===== Blender Material - create height map from 3d geo =====
+ref:
+  * create height map from mesh
+    * https://blender.stackexchange.com/questions/105283/create-height-bitmap-from-mesh
+  * bake texture
+    * https://brandonsdrawings.com/texture-baking/
+the reverse process:
+  * texture driven to mesh : https://www.youtube.com/watch?v=McALCOr39rY