Nika Ragua with a multi-part look at creating a sunflower procedurally with Softimage ICE taking a look at getting the distribution pattern of the sunflower seeds working correctly.

procedural sunflower creation in ICE tutorial part 1 which covers the topics of Fermat’s spiral, Polar coordinates, conversion between Polar and Cartesian coordinate system

Nika always gets pretty nerdy with his tutorials, which is pretty great, and this one is no exception where he takes a look at Fermat’s Spirals, Polar Coordinate Systems, and converting between Polar Coordinate Systems and Cartesian Coordinates. Nika also provides the tutorial file for download which can be found here as a direct link: Creating a Procedural Sunflower with SoftImage ICE.