Absolutely Marbelous Fence and Railing Default by Menaceman44 at Mod The Sims 4

Placing the file into your mods folder will automatically remove the llama head from any builds already in your game and any newly placed fences or railings. It will also add three new swatches to each; white; black pillars with black metal work; black pillars with gold metal work.

For those that would still like the llama head decoration present on the pillars I have also created a stand-alone decorative pillar that can be found under Decorations > Sculptures for a cost of 50 simoleons. It comes in all the original swatch options as well as the three newly added ones.
The footprint has been disabled for placement but is still enabled for routing so Sims won’t walk through them. What this means is that they can be placed inside the existing fence and railing pillars without needing to use the moveobjects cheat.