PrusaSlicer: Why is the bridge infill so ugly?
I'm trying to print a part with large overhangs - basically like printing a box upside down. At the top of the support structure, PrusaSlicer first prints two "Support material interface" layers. Those come out very smooth and are clearly intended to separate cleanly from the model.
But then it prints a single "Bridge infill" layer directly on top of that. This layer consists of widely spaced straight lines and is considered part of the actual model. After removing the support material, that bridge infill becomes the visible bottom surface of the print, and it looks terrible.
What confuses me is that the first normal layer above the bridge infill prints perfectly smooth again. So I don't understand why the bridge infill itself has to remain part of the object. If that layer could also detach with the support interface, the resulting overhang surface would actually look great.
The most frustrating part is that there seems to be almost no control over how this bridge infill is generated. You can adjust the spacing and density of the support interface layers, but not the spacing of the bridge infill itself. So you're stuck with these ugly, sparse lines as the visible surface.