# \#variable **URL:** https://discourse.mcneel.com/tag/variable/2463.md [Latest](https://discourse.mcneel.com/latest.md) · [Categories](https://discourse.mcneel.com/categories.md) · [Tags](https://discourse.mcneel.com/tags.md) --- ## [How to select inner vertex loops/rings on SubD geometry?](https://discourse.mcneel.com/t/how-to-select-inner-vertex-loops-rings-on-subd-geometry/221200)

**Author:** [@Dušan\_Amrich](https://discourse.mcneel.com/u/Du%C5%A1an_Amrich)\ **Replies:** 2\ **Last updated:** [August 5, 2026, 1:36pm UTC](https://discourse.mcneel.com/t/how-to-select-inner-vertex-loops-rings-on-subd-geometry/221200 "2026-08-05T13:36:03Z")

Hi everyone, I am working with a SubD shape in Grasshopper and building on top of a variable offset function I found here on the forum. I need help selecting specific rows or loops of vertices inside the geometry, n… --- ## [Variable offset mesh for complex hemisphere](https://discourse.mcneel.com/t/variable-offset-mesh-for-complex-hemisphere/201508)

**Author:** [@Vincent\_Todosiev](https://discourse.mcneel.com/u/Vincent_Todosiev)\ **Replies:** 13\ **Last updated:** [March 31, 2025, 1:25pm UTC](https://discourse.mcneel.com/t/variable-offset-mesh-for-complex-hemisphere/201508 "2025-03-31T13:25:09Z")

Howdy, I know other threads have discussed this topic before, I have studied them and got this far but need some help. My end goal is exaggerate the topography of a mesh hemisphere, kind of like an exaggerated Z axis on … --- ## [Bug with VariableOffsetSrf](https://discourse.mcneel.com/t/bug-with-variableoffsetsrf/189032)

**Author:** [@Rhino\_Bulgaria](https://discourse.mcneel.com/u/Rhino_Bulgaria)\ **Replies:** 10\ **Last updated:** [August 6, 2024, 6:14am UTC](https://discourse.mcneel.com/t/bug-with-variableoffsetsrf/189032 "2024-08-06T06:14:59Z")

I found a bug while trying to offset the surface in the attached file via the VariableOffsetSrf command. The offset works in one direction, but fails in the opposite direction, resulting in creation of a huge surface wit…