The word USNR is often seen in the picture prompts posted on CIVITAI, and it seems that it is expected to have a different effect from the Japanese term for 「薄塗り」. In fact, most images using it actually feature the exact opposite style: atsunuri (heavy painting/thick application - or perhaps "ATNR"?). This LoRA was created to isolate the effects of USNR - which functions somewhat like a "detailer"- though I cannot pinpoint the exact nature of its impact. Roughly speaking, it tends to increase the level of detail, create a generally rougher artistic touch, and accentuate outlines. While the effect might differ slightly from what is typically seen with SDXL, it certainly delivers a noticeable result.