Geometry Nodes Starfield & Motion Lines (Updated 3.6.4)
These are two FX setups to scatter stars or lines on a sphere or half-sphere geometry. Both are light, fully procedural and can be transformed and animated in many ways. No simulation here.
I have been using these stars many times for space and sci-fi illustrations. It can be used to achieve animated FX (like star wars light-speed effect)as well.
It comes with 3 procedural shaders: Stars, Motion_Lines, World_Space (a world shader).
Version: Updated to 3.6.4 and +
This setup version is 1.1.
If you had already purchased the previous version, email me (Anabase.studio@gmail.com), I'll send you the scene.
What's new:
- new groups, enhanced presentation and performance.
- geometric culling feature on both. It will delete points outside the camera field.
- control object to ease orientation and scale of motion lines.
How to use it:
see included example scene for animation.
There are two collections: Starfield and Motion_lines, ready to use, just tweak parameters in the modifier tab.
Camera culling needs the right camera values (focal and picture ration) to work properly. You can use a driver when having an animated focal length.
Note: If you have a slow computer, avoid raising size (or density) too fast to prevent the number of points getting very high. Or set a high Kill_points value (near 1), and then decrese it.
Motion_Lines parameters (Starfield is just a simpler version of it):
Sphere_Radius: size of the emitter surface
Half-Sphere: switch to an half-sphere emitter.
point density is relative to the emitter surface so if you raise or shrink it, the number of point will follow.
Seed: emission random value
Kill_points: reduce the number of points randomly. Useful to animate appearance\disappearance effect, or adjuting visible points without changing density.
Line_radius: base Thickness of the lines
Line_Length: base length of the lines
Min_Size: small size will be randomized around this value
Max_Size: large size will be randomized around this value
Magnitude: increase or decrease the gap between the largest and smallest sizes.
Normal_to_Tangent: align instances to emitter surface.
Align_to_Controler: align lines with the Lines Controler object.
Camera_Culling: Enables camera culling
Camera: pick your active camera
Picture_Ratio: this value (resolution X / resolution Y) is needed for a good computation of camera culling, the method being geometric here (faster than raycast, it ignores ocludded objects though).
Frame_Scale: raise the value above 1 to prevent instances from poping during animations.
Focal_Length: the length of your focal (default is 50mm). This value is needed for a good computation of camera culling.
Material: material assigned to the line instances.
License: for any use, personal, educational or commercial.
By Sébastien Garnier / Anabase Studio, May 2024
Contact, feedback, requests: Anabase.studio@gmail.com
sgarnier
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Published | 6 months ago |
Blender Version | 3.6 |
License | Editorial |
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