diff --git a/CHANGELOG.md b/CHANGELOG.md
index aabb0e1a..003ccd77 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,7 @@ Repository: **<git+https://github.com/vladmandic/human.git>**
 
 ### **HEAD -> main** 2021/03/29 mandic00@live.com
 
+- enable buffering
 - new icons
 - new serve module and demo structure
 
diff --git a/README.md b/README.md
index f7770a3f..c63be2a5 100644
--- a/README.md
+++ b/README.md
@@ -16,8 +16,8 @@
 JavaScript module using TensorFlow/JS Machine Learning library  
 
 - **Browser**:  
-  Compatible with *CPU*, *WebGL*, *WASM* backends  
   Compatible with both desktop and mobile platforms  
+  Compatible with *CPU*, *WebGL*, *WASM* backends  
   Compatible with *WebWorker* execution
 - **NodeJS**:  
   Compatible with both software *tfjs-node* and  
@@ -27,9 +27,14 @@ Check out [**Live Demo**](https://vladmandic.github.io/human/demo/index.html) fo
 
 <br>
 
+## Demos
+
+- [**Demo Application**](https://vladmandic.github.io/human/demo/index.html)
+- [**Face Extraction, Description, Identification and Matching**](https://vladmandic.github.io/human/demo/facematch.html)
+- [**Face Extraction and 3D Rendering**](https://vladmandic.github.io/human/demo/face3d.html)
+
 ## Project pages
 
-- [**Live Demo**](https://vladmandic.github.io/human/demo/index.html)
 - [**Code Repository**](https://github.com/vladmandic/human)
 - [**NPM Package**](https://www.npmjs.com/package/@vladmandic/human)
 - [**Issues Tracker**](https://github.com/vladmandic/human/issues)
@@ -98,6 +103,10 @@ As presented in the demo application...
 
 ![Face Matching](assets/screenshot-facematch.jpg)
 
+**Face3D OpenGL Rendering:**
+
+![Face Matching](assets/screenshot-face3d.jpg)
+
 **468-Point Face Mesh Defails:**  
 
 ![FaceMesh](assets/facemesh.png)
diff --git a/package.json b/package.json
index aa4a7489..a367a3be 100644
--- a/package.json
+++ b/package.json
@@ -62,7 +62,7 @@
     "@vladmandic/pilogger": "^0.2.15",
     "chokidar": "^3.5.1",
     "dayjs": "^1.10.4",
-    "esbuild": "^0.11.0",
+    "esbuild": "^0.11.2",
     "eslint": "^7.23.0",
     "eslint-config-airbnb-base": "^14.2.1",
     "eslint-plugin-import": "^2.22.1",
diff --git a/src/image/image.ts b/src/image/image.ts
index 8e6e2d25..e09c4a3e 100644
--- a/src/image/image.ts
+++ b/src/image/image.ts
@@ -1,6 +1,5 @@
 // @ts-nocheck
 
-import { log } from '../helpers';
 import * as tf from '../../dist/tfjs.esm.js';
 import * as fxImage from './imagefx';
 
@@ -17,6 +16,9 @@ let fx = null;
 export function process(input, config): { tensor: tf.Tensor, canvas: OffscreenCanvas | HTMLCanvasElement } {
   let tensor;
   if (!input) throw new Error('Human: Input is missing');
+  if (!(input instanceof tf.Tensor) && !(input instanceof ImageData) && !(input instanceof ImageBitmap) && !(input instanceof HTMLVideoElement) && !(input instanceof HTMLCanvasElement) && !(input instanceof OffscreenCanvas)) {
+    throw new Error('Human: Input type is not recognized');
+  }
   if (input instanceof tf.Tensor) {
     tensor = tf.clone(input);
   } else {
@@ -36,10 +38,7 @@ export function process(input, config): { tensor: tf.Tensor, canvas: OffscreenCa
     else if (config.filter.height > 0) targetWidth = originalWidth * (config.filter.height / originalHeight);
     if (config.filter.height > 0) targetHeight = config.filter.height;
     else if (config.filter.width > 0) targetHeight = originalHeight * (config.filter.width / originalWidth);
-    if (!targetWidth || !targetHeight) {
-      log('Human: invalid input', input);
-      return { tensor: null, canvas: null };
-    }
+    if (!targetWidth || !targetHeight) throw new Error('Human: Input cannot determine dimension');
     if (!inCanvas || (inCanvas.width !== targetWidth) || (inCanvas.height !== targetHeight)) {
       inCanvas = (typeof OffscreenCanvas !== 'undefined') ? new OffscreenCanvas(targetWidth, targetHeight) : document.createElement('canvas');
       if (inCanvas.width !== targetWidth) inCanvas.width = targetWidth;
diff --git a/wiki b/wiki
index df23c6e6..8bca078e 160000
--- a/wiki
+++ b/wiki
@@ -1 +1 @@
-Subproject commit df23c6e6fdd3aedd5da6ee08d90d61983a761e91
+Subproject commit 8bca078ef07d67c623bd2cb1a207a4bc8d743a60