diff --git a/src/abr.cpp b/src/abr.cpp
index d41a052..5d4dba6 100644
--- a/src/abr.cpp
+++ b/src/abr.cpp
@@ -127,7 +127,10 @@ std::vector<std::shared_ptr<Brush>> ABR::compute_brushes(const std::string& path
         b->m_tip_aspect = (1.f - samp->value<UnitFloat>("Rndn") * 0.01) * 0.5f + 0.5f;
         b->m_tip_size = samp->value<UnitFloat>("Dmtr");
         b->m_tip_spacing = samp->value<UnitFloat>("Spcn") * 0.01f;
-        b->m_tip_angle = -samp->value<UnitFloat>("Angl") / 360.f; // [0, 360] -> [0, 1]
+
+        float tip_angle = -samp->value<UnitFloat>("Angl") / 360.f;
+        b->m_tip_angle = tip_angle >= 0.f ? tip_angle : tip_angle + 1.f; // [-180, 180] -> [0, 1]
+
         b->m_tip_flipx = samp->value<Boolean>("flipX");
         b->m_tip_flipy = samp->value<Boolean>("flipY");
 
@@ -278,7 +281,10 @@ std::vector<std::shared_ptr<Brush>> ABR::compute_brushes(const std::string& path
             //b->m_tip_aspect = (1.f - samp->value<UnitFloat>("Rndn") * 0.01) * 0.5f + 0.5f;
             b->m_dual_size = samp->value<UnitFloat>("Dmtr") / b->m_tip_size;
             b->m_dual_spacing = samp->value<UnitFloat>("Spcn") * 0.01f;
-            //b->m_tip_angle = samp->value<UnitFloat>("Angl") / 360.f + 0.5f; // [-180, 180] -> [0, 1]
+
+            float tip_angle = -samp->value<UnitFloat>("Angl") / 360.f;
+            b->m_dual_angle = tip_angle >= 0.f ? tip_angle : tip_angle + 1.f; // [-180, 180] -> [0, 1]
+            
             //b->m_tip_wet = p->value<UnitFloat>("Wtdg");
             //b->m_tip_noise = (float)samp->value<UnitFloat>("Nose");
             b->m_tip_flipx = samp->value<Boolean>("flipX");