From 83bb7e740eb0caeb99230cd998fb6b4356b09cd7 Mon Sep 17 00:00:00 2001
From: Dave Pagurek <davepagurek@gmail.com>
Date: Wed, 20 May 2026 14:35:37 -0400
Subject: [PATCH 1/2] Handle null tint in Renderer3D

---
 src/core/p5.Renderer3D.js                        |   7 +++++--
 test/unit/visual/cases/webgl.js                  |   9 +++++++++
 .../000.png                                      | Bin 0 -> 7309 bytes
 .../metadata.json                                |   3 +++
 4 files changed, 17 insertions(+), 2 deletions(-)
 create mode 100644 test/unit/visual/screenshots/WebGL/Opacity/noTint() before image() does not throw/000.png
 create mode 100644 test/unit/visual/screenshots/WebGL/Opacity/noTint() before image() does not throw/metadata.json

diff --git a/src/core/p5.Renderer3D.js b/src/core/p5.Renderer3D.js
index 6974561b4f..d83df0170d 100644
--- a/src/core/p5.Renderer3D.js
+++ b/src/core/p5.Renderer3D.js
@@ -137,7 +137,7 @@ export class Renderer3D extends Renderer {
     this.states._useShininess = 1;
     this.states._useMetalness = 0;
 
-    this.states.tint = new Color([1, 1, 1, 1]);
+    this.states.tint = null;
 
     this.states.constantAttenuation = 1;
     this.states.linearAttenuation = 0;
@@ -1502,7 +1502,10 @@ export class Renderer3D extends Renderer {
     // works differently and is global p5 state. If the p5 state has
     // been cleared, we also need to clear the value in uSampler to match.
     fillShader.setUniform("uSampler", this.states._tex || empty);
-    fillShader.setUniform("uTint", this.states.tint._getRGBA([255, 255, 255, 255]));
+    fillShader.setUniform(
+      "uTint",
+      this.states.tint?._getRGBA([255, 255, 255, 255]) ?? [255, 255, 255, 255]
+    );
 
     fillShader.setUniform("uHasSetAmbient", this.states._hasSetAmbient);
     fillShader.setUniform("uAmbientMatColor", this.states.curAmbientColor);
diff --git a/test/unit/visual/cases/webgl.js b/test/unit/visual/cases/webgl.js
index fd0cb09d0a..7519d4e2ea 100644
--- a/test/unit/visual/cases/webgl.js
+++ b/test/unit/visual/cases/webgl.js
@@ -645,6 +645,15 @@ visualSuite('WebGL', function() {
       p5.circle(0, 0, 50);
       screenshot();
     });
+
+    visualTest('noTint() before image() does not throw', async (p5, screenshot) => {
+      p5.createCanvas(50, 50, p5.WEBGL);
+      const img = await p5.loadImage('/test/unit/assets/cat.jpg');
+      p5.noTint();
+      p5.imageMode(p5.CENTER);
+      p5.image(img, 0, 0, 50, 50);
+      screenshot();
+    });
   });
 
   visualSuite('Hooks coordinate spaces', () => {
diff --git a/test/unit/visual/screenshots/WebGL/Opacity/noTint() before image() does not throw/000.png b/test/unit/visual/screenshots/WebGL/Opacity/noTint() before image() does not throw/000.png
new file mode 100644
index 0000000000000000000000000000000000000000..c92e8ba0a89d4e782a9055b7ac318c424e4bfc2b
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diff --git a/test/unit/visual/screenshots/WebGL/Opacity/noTint() before image() does not throw/metadata.json b/test/unit/visual/screenshots/WebGL/Opacity/noTint() before image() does not throw/metadata.json
new file mode 100644
index 0000000000..2d4bfe30da
--- /dev/null
+++ b/test/unit/visual/screenshots/WebGL/Opacity/noTint() before image() does not throw/metadata.json	
@@ -0,0 +1,3 @@
+{
+  "numScreenshots": 1
+}
\ No newline at end of file

From a5cb6fe41fd24baae68b82835d3e22e1a8419dac Mon Sep 17 00:00:00 2001
From: Dave Pagurek <davepagurek@gmail.com>
Date: Wed, 20 May 2026 14:43:21 -0400
Subject: [PATCH 2/2] Update WebGL tests to allow null tint

---
 test/unit/webgl/p5.RendererGL.js | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/test/unit/webgl/p5.RendererGL.js b/test/unit/webgl/p5.RendererGL.js
index 93582483b6..079b8000f6 100644
--- a/test/unit/webgl/p5.RendererGL.js
+++ b/test/unit/webgl/p5.RendererGL.js
@@ -1517,10 +1517,12 @@ suite('p5.RendererGL', function() {
   });
 
   suite('tint() in WEBGL mode', function() {
-    test('default tint value is set and not null', function() {
+    test('default tint value', function() {
       myp5.createCanvas(100, 100, myp5.WEBGL);
-      assert.deepEqual(myp5._renderer.states.tint
-        ._getRGBA([255, 255, 255, 255]), [255, 255, 255, 255]);
+      assert.deepEqual(
+        myp5._renderer.states.tint?._getRGBA([255, 255, 255, 255]) ?? [255, 255, 255, 255],
+        [255, 255, 255, 255]
+      );
     });
 
 
@@ -1581,7 +1583,7 @@ suite('p5.RendererGL', function() {
           };
         });
       }).then(function(_tint) {
-        assert.deepEqual(_tint._getRGBA([255, 255, 255, 255]),
+        assert.deepEqual(_tint?._getRGBA([255, 255, 255, 255]) ?? [255, 255, 255, 255],
           [255, 255, 255, 255]);
       });
     });