// trainer · Topology
Clean Mesh
Three meshes, one bend: pick the one that deforms predictably instead of breaking or forming a pole.
#What it trains
The ability to see, before any animation, whether a mesh will survive movement. A model can look perfect and still break the moment you bend it. The exercise illustrates the topic of Block 4 with a moving picture instead of a static slide.
#How it works
You see three panels that bend by the same angle at the same moment. The form is the same everywhere; only the rows of loops on it differ. Pick the one whose mesh deforms predictably.
| What you’ll see | Why |
|---|---|
| Even loops exactly in the bend zone — clean quads | this is the right answer: a quad mesh and edge flow around the bend |
| Just as many loops as the correct mesh — only in the wrong place | dense on the flat stretches, only three right in the bend: the count isn’t the problem, the placement is |
| A triangular fan pole exactly in the bend zone | the worst possible place for a pole: the mesh “twists” unpredictably |
#What we take from it
- A beautiful shape is no guarantee: check the mesh on a real bend.
- What matters here is not how many loops you have, but where they are. The second option has exactly as many loops as the correct one — they just sit where the surface is already flat, not where it bends.
- Edge loops should run around a joint, like rings around a finger, not through it.
- A quick by-eye test in Blender is MatCap: on a bad mesh the reflections “swim”.
In the session we go through 2–3 rounds together out loud, and then everyone diagnoses their own object from block 3.