diff --git a/src/main.py b/src/main.py
index 5832970..9577305 100644
--- a/src/main.py
+++ b/src/main.py
@@ -688,8 +688,10 @@ def build_nexus_file(pld_fabrication, output_path, rheed_osc=None, heatmap_matri
             heatmap.attrs["units"] = "a.u."
             # this is of my own initiative. good???
             heatmap.attrs["interpretation"] = "spectrum"
-            # suggested by DeepSeek, useful?
-            heatmap.attrs["suggested_colormap"] = "viridis"
+            # suggested by DeepSeek, useful? probably not.
+            heatmap.attrs["suggested_colormap"] = "inferno"
+            heatmap.attrs["scale_min"] = 0.0
+            heatmap.attrs["scale_max"] = 1.0
     return
 
 
@@ -731,10 +733,10 @@ if __name__ == "__main__":
         # if os.path.isfile("tests/LAO_16min50s_736C_STO.png"): # if PNG
         img = Image.open("tests/LAO_16min50s_736C_STO.bmp").convert("L")
         mx = np.array(img, dtype=np.uint8)
-        normalized_mx = mx.astype(np.float32) / 255.0  # consider deleting???
+        mx = mx.astype(np.float32) / 255.0  # consider deleting???
     build_nexus_file(
         result,
         output_path=f"output/sample-{sample_name}-nexus.h5",
         rheed_osc=rheed_osc,
-        heatmap_matrix=normalized_mx,
+        heatmap_matrix=mx,
     )