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-rw-r--r--materials.py1
1 files changed, 1 insertions, 0 deletions
diff --git a/materials.py b/materials.py
index 9639a52..4245212 100644
--- a/materials.py
+++ b/materials.py
@@ -2,6 +2,7 @@ class Material(object):
def __init__(self, name='none'):
self.name = name
+ self.wavelengths = None
self.refractive_index = None
self.absorption_length = None
self.scattering_length = None