Create Fire

Using only one light you can create fire and flames with CINEMA 4D XL!

Step 1: The first thing you need to do is set up your camera so you'll be able to preview the flames as you tweak with them. Bring in a Camera (Objects=>Scene=>Camera) and position it at X=0 Y=1000 Z=-900 using the Coordinates Manager. For the Rotation values set H=0 P=-7 B=0. Your view is now set up to view the fire.

Step 2: Create a Light (Objects=>Scene=>Light). Double click on its icon in the object manager to change the settings. The General tab is where you'll set the color and brightness of your flames, as well as a couple of other settings necessary for the effect to work. Set 'Visible Light' to 'Visible' and set 'Noise' to 'Both'.

Step 3: You'll most likely want an orange color for your flame and you will want to crank up the brightness so you have a bright hot center to the fire. Used here is R=90% G=50% B=20% Br=175%. These settings can be played with depending on the type of flame you want to create.

Step 4: In the Details tab set the Falloff to Inverse Square and set Inner Distance to 500m and Outer Distance to 2000m.

Step 5: In the Visible Light tab also set the Inner Distance to 500m and the Outer Distance to 2000m. Check the box for Outer Distance Z and enter 250m for the value. Uncheck the box for Adapt Brightness and set the Brightness to 300%. These settings will determine where the fire will exist in your workspace. You can adjust them to fit you needs.

Step 6: Now comes the magic part. Click on the Noise tab to adjust the noise settings. Set the type to Wavy Turbulence, you will see a preview of your noise in the small window in the upper right corner.

Step 7: At this point you have to decide what type of fire look are you trying to achieve. The octaves setting determines how much variation and noise you are going to get within the flames. Set the Ocatave to 1 for softer flames, or 8 for harsher flames as seen here.

Step 8: The velocity setting determines how fast the wavy turbulence will move about. You want to set this fairly high to simulate fire, somewhere around 300%. Keep in mind that almost all of these settings can be played around with to produce different fiery looks and are definitly not set in stone.

Step 9: Getting the Brightness and Contrast settings right are a major part of getting your fire to look good. What usually works best is setting the brightness way down and setting the contrast way up so you get some strong bright flames. Set the Brightness to around -50% and the Contrast to 200%.

Step 10: The Scale settings will determine the size of the fire. Depending on where you set your camera up you can adjust this so that flames look right. The only thing changed here was making Y=150 so that the flames are a bit taller than they are wide or deep.

Step 11: Another major part of creating this fire is getting the Wind settings down. You'll want the Y direction to be prominent of course so that the flames will move up. You can also choose to crank up the X value so you get a bit of sideways movement. Positive values move the noise right while negative values move it left. The settings used here are X=-1m Y=5m Z=0m.

Step 12: You'll notice that your noise still isn't going anywhere in the preview. You need to enter a value for the Velocity setting and you will see your fire come alive. This value determines just how fast the fire will travel in whatever direction you told it to go with the wind settings. The Velocity value used for this fire is 6.

Step 13: Your fire will automatically animate because of the Noise settings over any amount of time. Set up how many frames you wish to render out and save your animation as a movie. These are especially cool as backdrops for logo animations.

Here is a different style of fire created by simply tweaking with the Noise settings and the flame color (R=85% G=50% B=20% Br=200%). The Noise settings used here are Type=Wavy Turbulence, Octaves=1, Velocity=300%, Brightness=-150%, Contrast=350%, Scale: X=100 Y=150 Z=100, Wind: X=1 Y=5 Z=1 Velocity=10.

Source :http://www.exguides.org

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