Question Galaxy effect

Hello, I want to make galaxy map, but I don't know what. I tried particle system but it was bad (she was always changing position and shapes). How to make "nebula" gas arms galaxy? How to make galaxy stars light ? I don't need to have very detailed ones like planets. Please help

 

Are you trying to make a map, or a galaxy?

 

I want a galaxy because I need a 3D effect when scrolling (there will be a 2D gameobject with a border above it) I want the user to be able to tilt 30°. I am now trying to use the particle system to make the Nebula gas cloud effect, but I cannot save the positions of the particles. I need it to be static and the same, which unfortunately the particle system does not do. Please help

 

Shuriken can process about 5000 billboards loop & prewarm and they can be made to orbit like a vortex
It can also come to a halt by adjusting the sim time down to 0
and it is random based on a seed, so you could set the seed to a single value

the billboard can be a smokey texture and some shader you construct to add more visual complexity

though this can help you make a galaxy, it is not the only way, nor optimized for whatever function/visual target you actually need

 

i think you can make the particles to always be at the same position, there is an option to make them "random" you just need to unchek it, i'm not 100% sure tho

 

Thanks

 

I need help the most, how to set the positions of individual particles. My code not working.

using UnityEngine;
using System;
using System.IO;

[Serializable]
public class ParticlePositionData
{
public Vector3 position;
}

public class ParticleSystemManager : MonoBehaviour
{
public ParticleSystem particleSystem;

private void Update()
{
if (Input.GetKeyDown(KeyCode.S))
{
Debug.Log("S key pressed. Saving particle positions...");

particleSystem.Stop();

SaveParticlePositions();

particleSystem.Play();
}
}

public void SaveParticlePositions()
{
ParticleSystem.Particle[] particles = new ParticleSystem.Particle[particleSystem.main.maxParticles];
int particleCount = particleSystem.GetParticles(particles);

ParticlePositionData[] particlePositionDataArray = new ParticlePositionData[particleCount];

for (int i = 0; i < particleCount; i++)
{
particlePositionDataArray = new ParticlePositionData();
particlePositionDataArray.position = particles.position;
}

string jsonData = JsonUtility.ToJson(particlePositionDataArray);
string filePath = Path.Combine(Application.dataPath, "particlepositiondata.json");

using (StreamWriter writer = new StreamWriter(filePath))
{
writer.Write(jsonData);
}

Debug.Log("Particle positionss saved to: " + filePath);
}
}