[0]unity打包模型遇到报错

报错1：Unsupported texture format - Texture2D::EncodeTo functions do not support compressed texture formats.
UnityEngine.ImageConversion:EncodeToPNG(Texture2D)
p:a(Texture2D, c, String)
p:c(c)
p:j()
p:k()
p:b(String)
LayaAir3D:exportResource(Boolean, Int32, String)
LayaAir3D:ExportResources()
LayaAir3D:OnGUI()
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)
报错2：ArgumentNullException: Value cannot be null.
Parameter name: buffer