diff --git a/conductor/tracks/optimize_wall_texture_sampling_20260203/plan.md b/conductor/tracks/optimize_wall_texture_sampling_20260203/plan.md
new file mode 100644
index 0000000..7994200
--- /dev/null
+++ b/conductor/tracks/optimize_wall_texture_sampling_20260203/plan.md
@@ -0,0 +1,11 @@
+# Implementation Plan - Optimize Wall Texture Sampling using VRT
+
+## Phase 1: Implement VRT-based Sampling
+- [x] Task: Create reproduction test case in `tests/test_buildings_texture.py` (f2d71da)
+    - [ ] Mock GDAL Open on VRT and verify windowed read arguments.
+    - [ ] Verify handling of coordinates that might cross tile boundaries.
+- [x] Task: Refactor orthophoto sampling in `geodata_pipeline/buildings.py` (f2d71da)
+    - [ ] Change input source from `ortho_path` to `cfg.work.ortho_vrt`.
+    - [ ] Calculate `xoff`, `yoff`, `xsize`, `ysize` based on tile bounds and VRT geotransform.
+    - [ ] Implement `ReadAsArray` with the calculated window.
+    - [ ] Adjust the pixel coordinate calculation (`col`, `row`) to be relative to the VRT window.