Some Trouble With PBRCustomMaterial

Hi~ I have a trouble with PBRCustomMaterial, I write a water pbrCustomMaterial, like this picture, I think the specular range is too small, how can I expend it from green to red?

It seems you are using the Unity to Babylon.js package?

If that is so, maybe @MackeyK24 will be able to help but I’m not sure using a PBRCustomMaterial is related to your question… A repro in the Playground would probably help people help you.