From 127d1d08e4328a11c581a8b5ef03e7e97ae0e379 Mon Sep 17 00:00:00 2001
From: Abhik Ahuja <ahujaabhik@berkeley.edu>
Date: Mon, 28 Nov 2022 23:36:07 -0800
Subject: [PATCH] Fix normal orientation loss

---
 nerfstudio/model_components/losses.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/nerfstudio/model_components/losses.py b/nerfstudio/model_components/losses.py
index 1946e4abc..a5529e5c8 100644
--- a/nerfstudio/model_components/losses.py
+++ b/nerfstudio/model_components/losses.py
@@ -182,7 +182,7 @@ def orientation_loss(
     """
     w = weights
     n = normals
-    v = viewdirs
+    v = viewdirs * -1
     n_dot_v = (n * v[..., None, :]).sum(axis=-1)
     return (w[..., 0] * torch.fmin(torch.zeros_like(n_dot_v), n_dot_v) ** 2).sum(dim=-1)