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diff --git a/indra/newview/app_settings/shaders/class1/deferred/textureUtilV.glsl b/indra/newview/app_settings/shaders/class1/deferred/textureUtilV.glsl
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+/** 
+ * @file class1/deferred/textureUtilV.glsl
+ *
+ * $LicenseInfo:firstyear=2023&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2023, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+// This shader code is taken from the sample code on the KHR_texture_transform
+// spec page page, plus or minus some sign error corrections (I think because the GLSL
+// matrix constructor is backwards?):
+// https://github.com/KhronosGroup/glTF/tree/main/extensions/2.0/Khronos/KHR_texture_transform
+// Previously (6494eed242b1), we passed in a single, precalculated matrix
+// uniform per transform into the shaders. However, that was found to produce
+// small-but-noticeable discrepancies with the GLTF sample model
+// "TextureTransformTest", likely due to numerical precision differences. In
+// the interest of parity with other renderers, calculate the transform
+// directly in the shader. -Cosmic,2023-02-24
+vec2 khr_texture_transform(vec2 texcoord, vec2 scale, float rotation, vec2 offset)
+{
+    mat3 scale_mat = mat3(scale.x,0,0, 0,scale.y,0, 0,0,1);
+    mat3 offset_mat = mat3(1,0,0, 0,1,0, offset.x, offset.y, 1);
+    mat3 rotation_mat = mat3(
+        cos(rotation),-sin(rotation), 0,
+        sin(rotation), cos(rotation), 0,
+                    0,             0, 1
+    );
+
+    mat3 transform = offset_mat * rotation_mat * scale_mat;
+
+    return (transform * vec3(texcoord, 1)).xy;
+}
+
+// vertex_texcoord - The UV texture coordinates sampled from the vertex at
+//     runtime. Per SL convention, this is in a right-handed UV coordinate
+//     system. Collada models also have right-handed UVs.
+// khr_gltf_transform - The texture transform matrix as defined in the
+//     KHR_texture_transform GLTF extension spec. It assumes a left-handed UV
+//     coordinate system. GLTF models also have left-handed UVs.
+// sl_animation_transform - The texture transform matrix for texture
+//     animations, available through LSL script functions such as
+//     LlSetTextureAnim. It assumes a right-handed UV coordinate system.
+// texcoord - The final texcoord to use for image sampling
+vec2 texture_transform(vec2 vertex_texcoord, vec4[2] khr_gltf_transform, mat4 sl_animation_transform)
+{
+    vec2 texcoord = vertex_texcoord;
+
+    // Apply texture animation first to avoid shearing and other artifacts
+    texcoord = (sl_animation_transform * vec4(texcoord, 0, 1)).xy;
+    // Convert to left-handed coordinate system. The offset of 1 is necessary
+    // for rotations to be applied correctly.
+    texcoord.y = 1.0 - texcoord.y;
+    texcoord = khr_texture_transform(texcoord, khr_gltf_transform[0].xy, khr_gltf_transform[0].z, khr_gltf_transform[1].xy);
+    // Convert back to right-handed coordinate system
+    texcoord.y = 1.0 - texcoord.y;
+
+    // To make things more confusing, all SL image assets are upside-down
+    // We may need an additional sign flip here when we implement a Vulkan backend
+
+    return texcoord;
+}