Use x*100 transfunc in visual tests and add title

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: timtreis

tests/_images/Labels_transfunc_applied_to_continuous_labels.png

@@ -296,7 +296,9 @@ def test_plot_can_color_with_norm_no_clipping(self, sdata_blobs: SpatialData):
         ).pl.show()
 
     def test_plot_transfunc_applied_to_continuous_labels(self, sdata_blobs: SpatialData):
-        sdata_blobs.pl.render_labels("blobs_labels", color="channel_0_sum", transfunc=np.sqrt).pl.show()
+        sdata_blobs.pl.render_labels("blobs_labels", color="channel_0_sum", transfunc=lambda x: x * 100).pl.show(
+            title="transfunc: x * 100"
+        )
 
     def test_plot_can_annotate_labels_with_table_layer(self, sdata_blobs: SpatialData):
         sdata_blobs["table"].layers["normalized"] = get_standard_RNG().random(sdata_blobs["table"].X.shape)

tests/_images/Shapes_transfunc_applied_to_continuous_shapes.png

@@ -734,8 +734,8 @@ def test_plot_can_color_with_norm_no_clipping(self, sdata_blobs_shapes_annotated
 
     def test_plot_transfunc_applied_to_continuous_shapes(self, sdata_blobs_shapes_annotated: SpatialData):
         sdata_blobs_shapes_annotated.pl.render_shapes(
-            element="blobs_polygons", color="value", transfunc=np.sqrt
-        ).pl.show()
+            element="blobs_polygons", color="value", transfunc=lambda x: x * 100
+        ).pl.show(title="transfunc: x * 100")
 
     def test_plot_datashader_can_color_with_norm_and_clipping(self, sdata_blobs_shapes_annotated: SpatialData):
         sdata_blobs_shapes_annotated.pl.render_shapes(