Cycles offers a lot of ways to use light. You are going to simulate the glow of a kiln as a white sphere acts as a light source and bounces light off red faces turning the light that bounces to red light:
Open a new file in Blender.
In the center of the top header, click theLMB over the button that says Blender Render, and choose Cycles Render from the drop-down menu as shown in the following screenshot:
Select the default lamp with theRMB. Press X to delete it.
Select the cube with theRMB and press the Tab key to get into Edit Mode.
In the 3D View Header, click on the Viewport Shading menu button and choose Wireframe.
In the 3D View Header, click on the Face select mode button.
Choose the face nearest to the camera.
Press E to extrude it, then Enter.
Press S, 0.5, and Enter.
Press E, -1.7, and Enter.
Press A to deselect all the faces.
Use theRMB and Shift+RMB keys to select only the four sides of the last extrusion you made, as seen on the left of the...