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- All about combining our Computer Generated Imagery (CGI) with real world environments.
- This can be models, particle effects etc.
- We will start with a still image and place a model into it.
- After we have mastered that we will conquer video footage!
Choosing Your Subject
- You can follow along with me, choose your own path or both!
- Keep it simple, this goes for both your model AND the “real” space it is going to occupy.
- Picture/photo, video or even another render
- We’ll grab a photo and check out it’s settings.
- This is important with both stills and videos.
- With you own video keep a note of the settings as they’re often lost
- Bringing different renders together into one final render.
- Compositing is done in the Node Editor.
- View your composite changes live.
- Learn how to scale a background image independently of the final render resolution.
- We will setup the camera using the settings gathered from the picture.
- Reiterate the importance of accurate camera data.
- Use the Text Editor to store data for reference.
- Start setting up a scene to match the photo.
- Can be difficult to comprehend at first.
- Initially focus on monochrome (Grayscale).
- Reminder that Colour is generated through 3 channels, Red, Green and Blue, with values from 0-1 (Sliders show 0-255).
- Each Pixel will have its own values.
- Use one value for all Pixels
Basic Mathematics
- Adding, subtracting, dividing and multiplying are just as you would expect them to be.
- Values that are less than 0 or greater than 1 are passed through unless clamped.
- Colour>Mix and Convertor>Math nodes function almost the same, however there are different options.
- Background Image - Visible
- Our Object - Visible
- Our Objects Shadow- Visible
- Ground - Used for capturing the shadow -Hidden
- How we can isolate the object by itself.
- How we can isolate the shadow by itself.
- We could take the background image and map it to an object that is visible in our render.
- We have all the 3D data to make a comparison scene.
- Create another Render Layer for comparison without the object and therefore no shadow.
- Need to consider the order of these layers.
- Markers track parts of the footage.
- Uses similar controls to the 3D Editor
- You’ll need a minimum of 8 in the scene to effectively track a camera, more the better.
- Well have a look at Pattern Size and Search size, discovering what they do.
- Recommend placing markers manually.
- You need the right camera details!
- Check the accuracy of our markers
- Average camera solve error of <1 is ideal, but not always necessary. We have to test and assess.
- May have to refine your markers more.
- Import assets you wish to use in your scene.
- Adjust your camera's view, if it is slightly out.
- Get the ground ready for shadows.
- (Updated 9/6/2018)
- Learn how to set your Background as transparent.
- The options are different in both Blender Render and Cycles.
- Relatively straightforward - however the options are hidden away!
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