diff --git a/package.json b/package.json
index 0069082..c4e3e1a 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "cobe",
-  "version": "0.6.1",
+  "version": "0.6.2",
   "type": "module",
   "main": "./dist/index.esm.js",
   "files": [
diff --git a/src/index.d.ts b/src/index.d.ts
index 92e17ba..a4062ea 100644
--- a/src/index.d.ts
+++ b/src/index.d.ts
@@ -24,6 +24,7 @@ export interface COBEOptions {
   opacity?: number
   offset?: [number, number]
   scale?: number
+  context?: WebGLContextAttributes
 }
 
 export default function createGlobe(
diff --git a/src/index.js b/src/index.js
index 7d48ff9..3f2434c 100644
--- a/src/index.js
+++ b/src/index.js
@@ -70,6 +70,7 @@ export default (canvas, opts) => {
       antialias: true,
       depth: false,
       preserveDrawingBuffer: false,
+      ...opts.context,
     },
     settings: {
       [OPT_DPR]: opts[OPT_DPR] || 1,
@@ -158,9 +159,9 @@ export default (canvas, opts) => {
       ],
     },
     onRender: ({ uniforms }) => {
-      const state = {}
+      let state = {}
       if (opts.onRender) {
-        opts.onRender(state)
+        state = opts.onRender(state) || state
         for (let k in OPT_MAPPING) {
           if (state[k] !== undefined) {
             uniforms[OPT_MAPPING[k]].value = state[k]