3d:modeling:topology

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3d:modeling:topology [2025/06/02 21:26] – external edit 127.0.0.13d:modeling:topology [2025/09/09 14:32] (current) – [Topology] mh
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 ====== Topology ====== ====== Topology ======
 +
 +=== Poles ===
 +
 +Edge flow is affected by the **poles** contained in a model. A **pole** is any vertex that has a number of connecting edges different than 4.
 +
 +When using **Subdivision modifier** this becomes very apparent and breaks the edge flow.
 +
 +{{:3d:modeling:broken-edge-flow.png?direct&400|}}
 +
 +When modeling, you create poles when you need to redirect the edge flow, for example with some edges going towards the top and other edges going sideways.
 +
 +Select a part of the edges going up and extrude them upwards, then select the side edge thus extruded all the way down to the bottom edge and extrude those outwards.
 +
 +{{:3d:modeling:poles-redirect-edge-flow.png?direct&400}}
 +
 +=== Bevels and Crease ===
 +
 +On edges, bevels and crease can be used to create support topology. 
 +
 +**Bevel** adds smoother topology at the expense of more vertices. 
 +
 +**Crease** imitates the presence of supporting loops without adding topology but can create uneven topology if the adjacent edges are not at equal distance from creased edge.
 +
 +{{:3d:modeling:edge-crease-bevel.png?direct&400}}
 +
 +
  
 ==== Topology Flow ==== ==== Topology Flow ====
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 When bridging between two meshes that have different numbers of edges / vertices, to conserve the quad based mesh and avoid n-gons use the knife tool **''K''** in a similar fashion: When bridging between two meshes that have different numbers of edges / vertices, to conserve the quad based mesh and avoid n-gons use the knife tool **''K''** in a similar fashion:
  
-{{:3d:modeling:topology-flow-1.png?direct&300|}}+{{:3d:modeling:topology-flow-1.png?direct&400|}}
  
 This also redirects the topology flow in a sort of 180° U-turn. This also redirects the topology flow in a sort of 180° U-turn.
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 === Going from 3 to 1 === === Going from 3 to 1 ===
  
-{{:3d:modeling:topology-flow-2.png?direct&300|}}+{{:3d:modeling:topology-flow-2.png?direct&400|}}
  
 This construction can bring 3 edges to a zone with one edge. Slide the middle edge inward, select the three edges and **''F''** to fill then the 1:1 edges and **''F''** to fill. This construction can bring 3 edges to a zone with one edge. Slide the middle edge inward, select the three edges and **''F''** to fill then the 1:1 edges and **''F''** to fill.
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 === Connecting 3 planes === === Connecting 3 planes ===
  
-{{:3d:modeling:topology-flow-3.png?direct&300|}}+{{:3d:modeling:topology-flow-3.png?direct&400|}}
  
 Keeping quads in the mesh enables a better control over the shape afterwards. Keeping quads in the mesh enables a better control over the shape afterwards.
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