Create Mismatch_from_cross-string_shade.md

Initial draft

Author: mikofski

Mismatch_from_cross-string_shade.md

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+Affects from shade are compiled, but can be summarized in two orthogonal categories:
+
+1. shade across all modules parallel to rows
+2. shade across few modules perpendicular to rows
+
+## uniform shade
+row-to-row shade on horizontal ground is an example of shade across all modules that
+is parallel to rows. i covered this in another blog post