Join Craig Whitaker for an in-depth discussion in this video Building the flag and establishing scale, part of VFX Techniques: Creating a CG Flag with Nuke X and Cinema 4D.
Here we are inside of Cinema 4D, let's go ahead and import the FBX file that we exported from Nuke. File > Merge Objects, exporting.fbx. Open, OK. Let's make sure we select 24 for our Frame Rate, hit OK. Now I want to go to Edit > Project Settings, make sure my FPS here is 24. We'll go to our Render Settings, change this to 1280, by 720, change that Frame Rate to 24 as well, and you can close that.
Now, we'll go to the camera. Let's select one of the animated properties, right-click, and hit Show Track. We're doing this here, so we can pull all of our key frames back, to frame 0 which is where we are starting our animation from. Let's make sure that's lined up right on frame 0. I'll select one of them just to double check, good. Let's make a background object. And a new material. Drag the material on our Background. Hit the Color channel. Let's add our footage. Under the Editor tab, we'll make sure we animate the preview. And let's turn off Specular. When we select our camera and activate it, you should see our six foot figure is lined up at world zero and there were axis from Nuke.
We scrub through, you should see those sticking as we would expect. Great. So let's go ahead and make a plane that will function as our flag. Set the plane, we're going to take our Width Segments for now down to 1, and the Orientation down to minus Z. And if you remember from our mock up, we'll set the Width to 1000 and our Height to 2000. I'm going to flip over to the top view here, so I can see where the axis are, and move that into position.
Now to make this a little easier, I can make the plane editable. Hit Shift+C, type axis. Select Axis Center. And we'll put the axis at the top, all the way to the left. This way, we can line this up directly with one of our axis points from Nuke. Hit P on the keyboard, I can select Enable Snap, and snap this oh, let's make sure I have axis selected. And we should be able to snap that now, directly onto one of those points from Nuke.
Back in my Perspective view, all I'll need to do now is align that, and using the other one as a guide, I'll make sure that that's lined up properly. So let's take a look here. See what we think. So kind of nudge that into position a little bit using the right access as a guide. Now I'm not using this to snap onto, I don't want it to reach all the way down there. But it's a guide to let me know where I need to align the right side of this flag. And I scrub through, you can see the left side is sticking, and the right side is sticking as well. And I'm looking at the space in between the flag and the post.
I'm also going to change my timeline to 200, while we're here. I can see that, that is sticking exactly how we need it to, which is great. So go back to the beginning here. Terrific. So, I think we're in a good shape to move forward and start developing our flag.
- Collecting reference materials
- Planning and blocking out the shot
- Analyzing and tracking the footage
- Solving the tracked shot and setting up the environment
- Creating and adjusting the cloth simulation
- Texturing the flag
- Rendering passes from 3D
- Color grading and adding grain