Why no Infill for SLA printers?
I have, amongst others, a Halot One resin printer, and my toolchain is to slice with PrusaSlicer to a .SL1 file, then use UVTools to tidy it up and generate a .cxdlp file for the printer. For the first time, I want to do non-solid infill, and find that I can't. The "Infill" option only appears if you've told PrusaSlicer that you have a filament printer. What's up with that? Why can't PrusaSlicer generate infill for a DLP printer?
RE: Why no Infill for SLA printers?
A resin printer develops a model, Submerged in a vat of resin. if a slicer was to enable traditional Filament style infill within a resin model all you would get, is a model with trapped, uncured resin in all of the infill spaces, which would be ineffective at saving resin, and would present a health hazard where a cracked model could leak un cured resin, at a later date.
Prusa slicer does however offer the option to hollow out a model and add holes to allow air into the void during printing and to allow the un cured resin to drain out of the void, as the model prints. also, if supports are enabled, Prusa slicer will add supports inside the void, if required.
typically you need to use the hollow tool to create a void within the model, then use the hole tool, to add a vent into the void, near the highest point in the suspended model (Usually the base) and another hole near the lowest point within the void, (Usually the top of the model) then print the model. after printing, washing and curing the model, the hole where the resin drains out, can often be filled with a drop of resin, on a toothpick or similar small tool, carefully placed into the hole, and allowed to cure.
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK