When creating a surface in ICEM it creates a strange looking surface which does not follow the external curves.

This is due to the surface being quite complex. Two approaches might resolve this, firstly you can section your complicated surface into smaller more simple surfaces which can get be made more easily. Do not worry about the additional curves and surfaces created, these can be meshed across by removing the connecting curves (done automatically via the build topology functions). The second way is to create a larger surface over the top of the bounding curves. If you don't dod a build toplogy of this, it will cut the necessary surface out from the larger surface leaving the surface in two sections, the required surface inside and the redundant trimmed part of the surface outside. Simply delete the part of the surface not required.

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