Hi, Thanks for buying the asset. The blue problem seems a tint issue, since the grass has tint enabled it can oversaturate the grass (i have that for special FX) and create this issue under the light.The tint is not meant to be used for brightness control, so i would recommend removing it and re-enable when the base grass looks good, for color variation. The specular can be turned lower at night, so the grass wont show bright. If it is still bright, i can add an option to the shader to control brigthness for example. Please let me know if any of the above helped and if not i will do some coding on the shader and send a version asap.