Thanks Karen1573 I tried that but the problem is still there. Here are Firefly render settings: Production quality Use displacement map disabled Raytracing off Cast shadows enabled Smooth polygons enabled Remove backfacing polygons enabled Use texture filtering enabled and set to 1.0 (min shading 1.000 - Max texture resolution to 4096) Pixels samples to 6 post filtering to 1 and type "box" So, textures resolution are 4096x4096 (body map). The problem disappears when texture filtering value is disabled but hairs and eyelashes are low quality). I don't know what to do.