Hair and fur are difficult to emulate in Luxrender. Unlike Daz, you can't use RiCurves to shortcut the hairs, so everything needs to be polygonal. Naturally, this pushes the polycount through the roof, and Lux doesn't like playing with extremely large files too much.
Ultimately, you want the 'Export to OBJ' option and then you'd re-import that and replace the existing RiCurve hair. Just be warned though, adding lots of hairs also adds lots of polygons which will undoubtedly push your render times high, along with your memory requirements, to say nothing of the file size of the exported source.
Comments
Hair and fur are difficult to emulate in Luxrender. Unlike Daz, you can't use RiCurves to shortcut the hairs, so everything needs to be polygonal. Naturally, this pushes the polycount through the roof, and Lux doesn't like playing with extremely large files too much.
Ultimately, you want the 'Export to OBJ' option and then you'd re-import that and replace the existing RiCurve hair. Just be warned though, adding lots of hairs also adds lots of polygons which will undoubtedly push your render times high, along with your memory requirements, to say nothing of the file size of the exported source.