Fix T98247 EEVEE: Regression: Shader To RGB not displaying textures

This was caused by the nodetree branch duplication not handling incoming
links to the copied node, making all bsdfs nodes use their default values.

1 files changed, 4 insertions, 3 deletions

diff --git a/source/blender/nodes/shader/node_shader_tree.cc b/source/blender/nodes/shader/node_shader_tree.cc
index c5f40a46ca3..ec97637ccd2 100644
--- a/source/blender/nodes/shader/node_shader_tree.cc
+++ b/source/blender/nodes/shader/node_shader_tree.cc
@@ -587,10 +587,11 @@ static bNode *ntree_shader_copy_branch(bNodeTree *ntree,
       }
     }
   }
-  /* Recreate links between copied nodes. */
+  /* Recreate links between copied nodes AND incomming links to the copied nodes. */
   LISTBASE_FOREACH (bNodeLink *, link, &ntree->links) {
-    if (link->fromnode->tmp_flag >= 0 && link->tonode->tmp_flag >= 0) {
-      bNode *fromnode = nodes_copy[link->fromnode->tmp_flag];
+    if (link->tonode->tmp_flag >= 0) {
+      bool from_node_copied = link->fromnode->tmp_flag >= 0;
+      bNode *fromnode = from_node_copied ? nodes_copy[link->fromnode->tmp_flag] : link->fromnode;
       bNode *tonode = nodes_copy[link->tonode->tmp_flag];
       bNodeSocket *fromsock = ntree_shader_node_find_output(fromnode, link->fromsock->identifier);
       bNodeSocket *tosock = ntree_shader_node_find_input(tonode, link->tosock->identifier);