Model with modifier Hair & Fur, Hair & Fur in mm.
You can increase or decrease the Hair Count parameter.
If the version of CORONA is higher than 1.4: “For Corona render, it is recommended to install version no lower than 1.5, because the glossiness of materials is configured taking into account PBR.”
TurboSmooth modifier is applied to the bow in the open stack. It can be adjusted as desired.
Hope to see it in your projects!