Subtitles of the Movie

In each picture I'm about to show you the hero version of the render appears at the top. Variations appear at the bottom. In our first image we see that a lower Raytrace Shadow Amount yields a dimmer effect. The candle appears overall less translucent. To the right the Raytrace Shadow Amount is back up but there is no Transmission Amount applied, so we lose a lot of detail in the color of the light. In the next image I've adjusted only the Thickness values. As you can see, a smaller Thickness value allows less light to be scattered through the object. Less light penetration yields a darker and denser effect. The Scatter Slider controls how far the light itself will spread throughout the model. Subsurface Scattering like this can also be thought of how much of the light is absorbed like a sponge throughout the material. The Focus Parameter helps determine where the light will be brightest. This value is also in World Units. The two images below have both of their Scatter values lowered, but we can see the Focus effect better. The effect is determined also by the size of the model, so higher numbers may not necessarily give you tighter focus of light. Finally, back to the left of the Transmission tab we again have Edge Controls. Depending on the complexity of your model the Edge Controls may add definition to the Transmission Effect as we see in the lower left image. If your renders are getting blown out Ð and it's easy to do Ð do not try to dial down the overall brightness in the Diffuse tab. In my opinion, that usually just make the material look washed out and the Transmission effect muddy. Instead, dial back either the Transmission amount, or the Thickness, or the Scatter. All three compound the brightness of the transmitted light.