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I am trying to create an eye according to the video tutorial "[Blender 3.1] Eye Rig SLOW AND HARD tutorial (30 minutes)(geometry nodes)". At the very beginning (4:20) I have difficulties.

a. I remove the vertex from the sphere.

b. I do Extrude Edges twice. The first time with a coefficient of 0.001 and the second time with zero.

c. I bring all 64 vertices to the 1m mark on the Y scale. Absolut Grid Snaps is on.

d. I arrange the geonodes as shown in the figure. I get a distorted sphere different from the sphere of the author.

enter image description here

The author's object has a different look than mine.

enter image description here

Is this possible due to individual coordinate system settings or other reasons? I have version 3.1 blender of standard configuration.

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His Auto Merge Vertices option is off (which merges points if they're very close to each other—like an automatic M Merge—By Distance). If yours is on, when you do the first extrude-then-scale operation, you'd get a single vertex for the iris instead of a very small circle. That could be the problem:

enter image description here

Update after inspecting the file: At the beginning of the tutorial, he rotates the sphere in Edit Mode. You must've rotated it in Object mode, which means its orientation was internally unchanged. Applying Rotation (Ctrl+A > Rotation), or changing the Cross Product vector to the Z axis (0, 0, 1) fixes the problem:

enter image description here

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