Supposed you have a cylinder
you extrude and then you want to finish it as a 1/2 dome
is there any function or script to do that in Blender 
Tanks & Salutations :yes:
There’s the to-sphere feature (also on ctrl-shift-s) which attempts to move the selected vertexes to be as if they were spread onto a sphere centered at the 3d cursor (so you have to be careful of your cursor position).
Add a uvsphere primative with the appropriate amount of segments and rings, cut it in half and attach it to the end of your cylinder.:spin:
Star
is there a wikipage explaining about this “to sphere”
where do you put the cursor to make it do a sphere ?
Tanks