* only calculate node preview that are visible (node_preview flag set &

node_hidden unset)

1 files changed, 9 insertions, 5 deletions

diff --git a/source/blender/compositor/intern/COM_Node.cpp b/source/blender/compositor/intern/COM_Node.cpp
index a65849901ed..06b6164be3c 100644
--- a/source/blender/compositor/intern/COM_Node.cpp
+++ b/source/blender/compositor/intern/COM_Node.cpp
@@ -87,11 +87,15 @@ void Node::addSetValueOperation(ExecutionSystem *graph, InputSocket *inputsocket
 void Node::addPreviewOperation(ExecutionSystem *system, OutputSocket *outputSocket)
 {
 	if (this->isInActiveGroup()) {
-		PreviewOperation *operation = new PreviewOperation();
-		system->addOperation(operation);
-		operation->setbNode(this->getbNode());
-		operation->setbNodeTree(system->getContext().getbNodeTree());
-		this->addLink(system, outputSocket, operation->getInputSocket(0));
+		if (!(this->getbNode()->flag & NODE_HIDDEN)) { // do not calculate previews of hidden nodes.
+			if (this->getbNode()->flag & NODE_PREVIEW) {
+				PreviewOperation *operation = new PreviewOperation();
+				system->addOperation(operation);
+				operation->setbNode(this->getbNode());
+				operation->setbNodeTree(system->getContext().getbNodeTree());
+				this->addLink(system, outputSocket, operation->getInputSocket(0));
+			}
+		}
 	}
 }