From b28656edafefc61e354bc056483395c69454b642 Mon Sep 17 00:00:00 2001
From: Adam Miles <adamile@microsoft.com>
Date: Mon, 24 Nov 2025 16:16:00 +0000
Subject: [PATCH] Clarify offset alignment requirement for subresource

Added alignment requirement for subresource offset.
---
 .../d3d12/ns-d3d12-d3d12_placed_subresource_footprint.md    | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/sdk-api-src/content/d3d12/ns-d3d12-d3d12_placed_subresource_footprint.md b/sdk-api-src/content/d3d12/ns-d3d12-d3d12_placed_subresource_footprint.md
index 06696c172e96..9da924acc6fe 100644
--- a/sdk-api-src/content/d3d12/ns-d3d12-d3d12_placed_subresource_footprint.md
+++ b/sdk-api-src/content/d3d12/ns-d3d12-d3d12_placed_subresource_footprint.md
@@ -57,7 +57,9 @@ Describes the footprint of a placed subresource, including the offset and the D3
 ### -field Offset
 
 The offset of the subresource within the parent resource, in bytes.
-            The offset between the start of the parent resource and this subresource.
+            The offset between the start of the parent resource and this subresource. 
+            
+This value must be aligned to D3D12_TEXTURE_DATA_PLACEMENT_ALIGNMENT (512) unless <a href="/windows/win32/api/d3d12/ns-d3d12-d3d12_feature_data_d3d12_options13">D3D12_FEATURE_DATA_D3D12_OPTIONS13::UnrestrictedBufferTextureCopyPitchSupported</a> is TRUE.
 
 ### -field Footprint
 
@@ -78,4 +80,4 @@ When copying textures, use this structure along with <a href="/windows/desktop/a
 
 ## -see-also
 
-<a href="/windows/desktop/direct3d12/direct3d-12-structures">Core Structures</a>
\ No newline at end of file
+<a href="/windows/desktop/direct3d12/direct3d-12-structures">Core Structures</a>