diff --git a/docs/upgrade-guide.md b/docs/upgrade-guide.md
index aab2e6de..1d2ad143 100644
--- a/docs/upgrade-guide.md
+++ b/docs/upgrade-guide.md
@@ -2,7 +2,11 @@
 
 ## Upgrading to v3.0
 
-#### `Matrix` transforms now return `Array` by default
+#### Matrix API changes
+
+* Matrix setter functions no longer support ommitted parameters. (Motivation: Increased API rigor, improved debugging and library compactness).
+
+#### `Matrix` transforms now return `Array`s by default
 
 The `Matrix4` and `Matrix3` classes no longer by default create new `Vector2`, `Vector3` and `Vector4` instances. Instead they create standard JavaScript arrays.
 
@@ -29,14 +33,12 @@ assert(vector instanceof Vector4);
 
 Motivation: This change reduces dependencies between math.gl core classes which improves tree-shaking and bundle sizes.
 
-### Matrix setter functions no longer support ommitted parameters
-
-Motivation: This change increases rigor, facilitates debugging, and improves library compactness, and the use case for default parameters was questionable.
 
 #### Deprecations
 
 | Method | Replacement | Reason |
 | --- |  --- | --- |
+| `Matrix*.setColumnMajor`     | `Matrix*.set`               | API simplification |
 | `Matrix4.transformPoint`     | `Matrix4.transform`         | Name alignment |
 | `Matrix4.transformVector`    | `Matrix4.transform`         | Name alignment |
 | `Matrix4.transformDirection` | `Matrix4.transformAsVector` | Name alignment |
diff --git a/modules/core/src/classes/base/matrix.js b/modules/core/src/classes/base/matrix.js
index ff6ad32b..7cdfe88e 100644
--- a/modules/core/src/classes/base/matrix.js
+++ b/modules/core/src/classes/base/matrix.js
@@ -1,5 +1,5 @@
 import MathArray from './math-array';
-import {checkNumber} from '../../lib/validators';
+import {checkNumber, deprecated} from '../../lib/validators';
 import {config} from '../../lib/common';
 
 export default class Matrix extends MathArray {
@@ -37,17 +37,6 @@ export default class Matrix extends MathArray {
     return this.copy(arguments);
   }
 
-  // accepts row major order, stores as column major
-  setTransposed() {
-    const {RANK} = this;
-    for (let row = 0; row < RANK; row++) {
-      for (let col = 0; col < RANK; col++) {
-        this[row * RANK + col] = arguments[col * RANK + row];
-      }
-    }
-    return this.check();
-  }
-
   toColumnMajor(result) {
     return this.toArray(result);
   }
@@ -88,4 +77,9 @@ export default class Matrix extends MathArray {
   multiplyMatrices(a, b) {
     return this.copy(a).multiplyRight(b);
   }
+
+  setColumnMajor() {
+    deprecated('Matrix.setColumnMajor', '3.0');
+    return this.set(arguments);
+  }
 }