Recommendation: NSDT scene editor helps you quickly build 3D application scenes that can be redeveloped
1. Create a basic scene
step 1
Open 3ds Max .
Open 3ds Max.
step 2
I made a simple scene. I put three objects with a certain distance from each other.
production object
step 3
Press Ctrl-C to create a camera in perspective view.
create camera
2. Set the object ID
step 1
With the teapot selected, right-click and select Object Properties .
object properties
step 2
It will open the Object Properties window. Set the Object ID value to 1 .
Object ID
step 3
In the same way, set the Object ID value of the cylinder to 2 .
Object ID
step 4
In the same way, set the object ID value of the box to 3 .
Object ID
3. Render in RPF format
step 1
Press Shift-Q or F9 to render the scene.
Shift-Q
step 2
Click the save image icon. It opens the save image window. Set the File Name to "Diffuse " and select the File Format as RPF . Click the Save button.
save image
step 3
It will open the RPF Image File Format window. Select the 16 bits per channel option. Open all options. Click on the OK button.
RPF image file format
4. Compositing in After Effects
step 1
Turn on After Effects . Import the Diffuse.RPF file in the timeline . You'll notice that the file comes with all the properties like Z Depth , Object ID , Z Coverage , etc.
open after effets
step 2
With the Diffuse.RPF layer selected , go to 3D Channels > Effect > ID Mask .
Effects > 3D Channels > ID Mask
step 3
In the ID Mask effect, the default value for ID Selection is set to 0 .
ID matte
step 4
Set the ID Selection value to 1 . You'll see that only the teapot is visible. This happens because I have set the object ID value of the teapot to 1 in 3ds Max.
ID card selection
step 5
Create a duplicate layer of the Diffuse.RPF layer by pressing Ctrl-D .
This time, set the ID Selection value to 2 . The cylinder is highlighted because in 3ds Max I have set the cylinder's Object ID to 2.
Diffuse.RPF
step 6
Again, make a duplicate layer of the Diffuse.RPF layer by pressing Ctrl-D . This time, set the ID Selection value to 3 . The box is also highlighted because in 3ds Max I have set the object ID of the box to 3.
Diffuse.RPF
step 7
You can give the layers the correct names for Teapot , Cylinder and Box . Put the diffuse layer in the background again to get the floor.
rename layer
step 8
Now you can control individual layers. For example, if you want to change the color of the teapot, just select the teapot layer and go to Effect > Color Correction > Hue/Saturation .
Hue/Saturation >> Effect of Color Correction
step 9
Change the Primary Hue value and you will see the teapot's color change accordingly.
main color tone
Step 10
In the same way, you can apply glow to cylinder layers. This way, you can control any individual layer and apply any effect.
shiny
5. Z Depth Compositing in After Effects
step 1
With the diffuse layer selected, go to Effect > 3D Channels > 3D Channel Extraction .
Effects > 3D Channels > 3D Channel Extraction
step 2
With the Z depth channel selected , it will look like the image below.
Z depth
step 3
You can use black and white values to get perfect Z depth. Just remember to keep it white from the camera, when it travels far it turns gray.
black and white
step 4
With the layers selected, press Ctrl-Shift-C to precompose. Rename the precomposition layer to Diffuse.rpf Comp 1 .
Ctrl-Shift-C
step 5
Bring the diffuse layer into the timeline. Turn off precomposition layers.
Diffuse layer
step 6
S_Z Diffuse layer with blur effect applied. Alternatively, you can use camera lens blur . It blurs the entire layer.
step 7
Pick the precomposited layer as the Z-buffer pass. Now you can get true depth of field in your images. The teapot on the front looks in focus, while the cylinder and box look out of focus.
Z buffer
in conclusion
In this tutorial, I've shown you how to control the realization of individual objects in a layer using only one pass. This is the US RPF file format. It contains almost every pass like Z Depth, Object ID, Material ID, Z Coverage etc, each of which can be done by using a layer.
In the next part of this tutorial, I'll show you the most useful and powerful file formats used in the industry to control everything.
Original link: Modeling Tutorial: How to use 3ds Max and After Effects to achieve multi-pass rendering and post-compositing - Part 2 (mvrlink.com)