void InitPreview()
{
OnDisable();
m_PreviewUtility = new PreviewRenderUtility();
m_PreviewUtility.camera.fieldOfView = 15f;
m_Mesh = PreviewRenderUtility.GetPreviewSphere();
var t = target as CubemapArray;
if (t == null)
{
return;
}
m_Material = (Material)EditorGUIUtility.LoadRequired("Previews/CubeArrayPreview.mat");
m_Material.mainTexture = t;
m_Slice = 0;
m_Mip = Mathf.RoundToInt(GetMipLevelForRendering());
m_MipCount = TextureUtil.GetMipmapCount(t);
m_Material.SetFloat("_SliceIndex", (float)m_Slice);
m_Material.SetFloat("_Mip", m_Mip);
m_Material.SetFloat("_Exposure", GetExposureValueForTexture(t));
}