Not Enough Roads 2
How to Use:
- Download the .blend file.
- Append the “Not-Enough-Roads-v2” collection into your scene. This will import 4 predefined presets.
- Choose the preset you need and start editing the appended road by drawing\extruding the curve or select another curve in modifier menu.
Nodes description
Main “Not Enough Roads” node
General
- A setup panel for selecting the landscape for road snapping and for choosing a single curve or a collection of curves, which will form the mesh.
- Optional "Subdivision surface"
- Switching between 4 materials
- "Trim Road" erases material from start and end of curve to make smoother transition.
- "Extend Curves" grows curves from start and end.
Width and Height
- Precisely edit topology of every edge loop of the mesh to achieve any desired width and height.
- Segments can be merged by assigning identical numbers for a simpler mesh.
Flatten Road
- Corrects road's tilt on slopes and "Smooth Iterations" to smooth terrain unevenness.
- "Junctions" disables flattening at intersections to avoid heavy overlapping, and "Blur Junctions" creates smooth transitions.
Camera Culling
- An optional panel for setting up culling to remove road objects (Fence, Street Light, Utility Pole) outside the camera view.
- Fill the fields with your camera values.
- Could be necessary to increase "Padding" to avoid pop-in/disappearing objects or shadows.
- "Safe Zone" disables camera culling within a specified range around camera.
- Deselect camera from every node until rendering if you experience slowdown while moving camera
Fence, Street Light, Utility Pole
- Select the side for instances.
- Specify the offset from the middle.
- Enable culling (if needed and previous panel is configured).
- Street lights can be set to light-only culling if you experience rendering slowdowns.
- Adjust the light intensity or color by modifying the original "Point" object or placing your own light source.
- "Gap" defines the distance between each object.
- "Junctions" removing instances at intersections.
Remove by Curve
- A panel for removing objects or editing material manually.
- Select a single curve or a collection of curves for removal.
- Adjust "Range" for distance from the curve and "Blur" for smoother transitions.
- "Texture Range" offsets the distance from "Range".
- "Snap to Surface" aligns curves with the road without manual adjustment.
"Vegetation for Not Enough Roads" node
Camera
- Similar to the previous node but includes an additional "Distance" option.
- "Start" is beginning of density reduction and "End" is where instances will stop spawn completely.
- Big objects like trees requires wider padding and especially if it has long shadows.
- "Safe zone" disables camera culling in specified range around camera.
Distribution
- Select collection of instances which will be scattered on a mesh.
- "Grow Zone" is an area defined by curve or curve circle where instances will appear but not outside.
- "Density" - number of instances.
- "Distance Min" is minimal distance between instances.
- "Viewport Reduction" decreasing "density" for viewport only to improve performance without disabling modifier.
Transform
- "Scale Multiplier" can be used to scale your instances.
- "Scale Z Multiplier" squeezes instances by z axis only.
- "Shift" is lowering position of instances.
Clumping
- Scaling and removing instances using scalable noise texture to create more natural distribution instead of plain.
Offset From Path
- "Offset Start" and "Offset End": Removes instances within a specified distance from the middle and ends of the road, respectively.
- Can be used to optimize number of instances by removing furthest from path.
- Blurring options for smoothing transitions.
Other
- "Junctions" removing instances on intersections.
- "Instance on Line" allows distributing instances on the middle line of road
Remove Density
- Select single curve or collection, specify distance, smoothness and instances will be removed around curve.
- "Remove on Slope" removes instances based on steepness of terrain "generally useful for landscape".
Simple Wind Simulation
- Changes rotation of instances based on noise texture
- Adjust speed, noise scale, intensity as you need
- Not recommended high intensity
- To enable, write "#frame" in the first field which has the same name. (Yea, that is weird way but any other ways updates whole node every frame even if turned off)
"Flatten Road" node
- This node made to flatten landscape for road. It affects only defined "Radius" from road and not whole terrain.
- Select curve or collection, adjust radius, and Iterations if needed and that is it.
Important notes and suggestions:
- I recommend extruding curve or using "ctrl + rmb" instead of drawing tool to have mor control and avoid any weird curve overlapping.
- If you see dark artefacts around vegetation - increase transparent bounces in render settings
- If you see vegetation or shadows pop in - increase padding of camera culling. Every vegetation layer can be configured individually.
- You can add as many vegetation layers as you want by duplicating node and choosing different collection and configuration.
- If you experience crashes with large roads, turn of road's objects (fence, street lights, utility poles) and vegetation until rendering.
- If your GPU "out of memory", setup "camera" panels in every node and enable camera culling with distance culling.
- Adaptive Subdivision adds a lot of realism and can be quite vram intensive at standard settings. Some tweaking may be needed.
- Absolutely recommend disabling vegetation, turning off simulation and deselecting camera from all nodes until rendering or you will get slow playback with large roads.
- If you don't see vegetation - check render distance or culling options and make sure if node turned on.
- There is no simple way to export road into another software.
- If you are going to use this scatter on another mesh, set "Offset End" to 1 and "Offset Start" to 0 (default values)
- If scattered on landscape vegetation overlaps with road, you can use road's curve in "Remove by Curve" panel of landscape's scattering modifier to delete vegetation near road.
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