FDM 3D models often fail in SLA printing because their designs don’t account for SLA’s resin curing, support, or precision needs.
FDM relies on self-supporting filament layers, so its models may have overhangs or thin walls that work for FDM but collapse in SLA—liquid resin needs external supports while curing.
SLA also demands tighter precision: FDM’s thicker walls or loose tolerances can cause rough surfaces or failed prints.
To convert FDM models for SLA, add supports to overhangs (angles over 45° usually need them) and adjust wall thickness to your printer’s minimum (often 0.2-0.5mm).