Is the render texture actually created?
public bool IsCreated() { return INTERNAL_CALL_IsCreated(this); }
static public int IsCreated(IntPtr l) { try { UnityEngine.RenderTexture self = (UnityEngine.RenderTexture)checkSelf(l); var ret = self.IsCreated(); pushValue(l, ret); return(1); } catch (Exception e) { return(error(l, e)); } }