You misunderstood my original post. The problem is: setting the 2D fill origin doesn't affect the 3D texture origin.
I'm assuming this still isn't available in Archicad. Setting the textures in 3D is double unnecessary work.
ArchiCAD 25 FRA 3011 + TwinMotion 2021.1.4
iMac Retina 27 2020 3,8 GHz Intel Core i7 8 cœurs
64 Go 2667 MHz DDR4
AMD Radeon Pro 5700 XT 16 Go