ReflectionProbe.size

Description

The size of the box area in which reflections will be applied to the objects. Measured in the probes's local space.

Размер куба будет масштабирован в соответствии с масштабом transform-а.

using UnityEngine;

public class Example : MonoBehaviour
{
    void Start()
    {
        ReflectionProbe probe = GetComponent<ReflectionProbe>();
        // Make the area long
        probe.size = new Vector3(10, 1, 1);
    }
}