Investigate multiple methods for sampling along normals

We currently use a naive strategy for sampling along normals (with thickness). There are multiple approaches we could try, like using morphosamplers and alternative interpolation methods (e.g. https://github.com/cellcanvas/surforama/issues/17).

Start by locating the current implementation of sampling along normals and review the referenced surforama issue for the proposed approaches. Compare the existing strategy with morphosamplers and alternative interpolation methods, then establish which approaches should be evaluated and what results would count as an improvement.

Written by the indexing model from the issue text.