Nautilus Pompilius shell - Lisa sorba

1 : Calculation of the proportions with the golden section and background done with green acrylic and blu/green anilines
2: Base with white mother pearl color mixed with blue water aniline
3 : Volumetric with extra white mother pearl
4: Shell stripes with copper/brown/orange acrylic
5. grey shades on the mother pearl
6: volumetry and shades with white/orange/grey/copper shades