render images of models

public static async void RenderPreviewImages(List<LevelTile> levelTileList,
        Vector3 positionOffset,int size, LayerMask renderLayer)
    {

        Camera cam = new GameObject("Preview Generator Camera").AddComponent<Camera>();
        var lastSceneCamera = SceneView.lastActiveSceneView.camera;

        cam.transform.position = Vector3.zero;
        //cam.transform.position = lastSceneCamera.transform.position;
        cam.transform.rotation = lastSceneCamera.transform.rotation;

        //cam.transform.position = Vector3.zero;
        //cam.transform.rotation = Quaternion.Euler(0, 0, 0);
        cam.clearFlags = CameraClearFlags.Color;

        cam.backgroundColor = new Color(0f, 0f, 0f, 0.46f);

        var cameraMatix = cam.transform.worldToLocalMatrix;

        RenderTexture rt = new RenderTexture(size, size, 32);

        cam.targetTexture = rt;
        cam.cullingMask = renderLayer;


        //var angleDown = Vector3.Angle(cam.transform.forward, Vector3.up);
        //var angleForward = Vector3.Angle(new Vector3(cam.transform.forward.x, 0, cam.transform.forward.z), Vector3.back);

        //Debug.Log("angle down = " + angleDown);
        //Debug.Log("angle forward = " + angleForward);

        //var rotation = Quaternion.Euler(0, 0, rotationOffset.z) * Quaternion.Euler(rotationOffset.x, rotationOffset.y, 0);

        var mtx = Matrix4x4.TRS(cam.transform.TransformPoint(positionOffset), Quaternion.identity, Vector3.one);

        foreach (var levelTile in levelTileList)
        {
            //var mtx = cameraMatix * Matrix4x4.TRS(Vector3.forward * 7,
            //              Quaternion

            //draw the mesh;
            Graphics.DrawMesh(
                levelTile.mesh, mtx,
                levelTile.material, renderLayer.GetMaskValue(), cam);

            Debug.Log("rendered to " + renderLayer.GetMaskValue());

            var texture = new Texture2D(size, size);

            RenderTargetImage(cam, ref texture);

            levelTile.previewTexture = texture;

            var pngData = texture.EncodeToPNG();

            // For testing purposes, also write to a file in the project folder
            File.WriteAllBytes(Application.dataPath + $"/TileThumbnails/{levelTile.name}.png", pngData);

            //AssetDatabase.CreateAsset(t, $"Assets/{levelTile.name}.png");

            await Task.Delay(1);

        }
        await Task.Delay(100);
        GameObject.DestroyImmediate(cam.gameObject);

        tilemap3DEditorWindow?.Refresh();
    }