GI Pipe Clamp compresses the contribution of indirect light in a scene. This way you can use it to clear any or all fireflies in a scene and get faster renders. GI Pipe Clamp is a pipe attachment which clamps around the pipe to connect the pipe to the remainder of a pipe hanger assembly. Pipe clamps are recommended for the suspension of cold pipe lines and may or may not be insulated. These are used as an efficient and tidy way to restrain, secure and guide tubing or conduit for a range of plumbing, heating and electrical purposes.