SPS Billboard Change Camera

[Robert_h]

Hey guys,

I'm looking for some help with my scene, specifically the grass that I am trying to create using the SPS. An example can be found here: https://roberthucks.com/3D/tests/test5/test5.html

As you can see, when you move the camera (arrow keys) the grass does not face the camera despite these settings:

grassSPS.billboard = true;
grassSPS.isAlwaysVisible = true;
grassSPS.computeParticleRotation = false;
grassSPS.computeParticleColor = false;
grassSPS.computeParticleTexture = false;

I have an idea as to why, it being that the way in which this project it set up the world is generated before the player so when the grass gets made there isn't a camera for it to face. Atleast thats my working theory. 

So my question is, is there a way for me to change which camera the particles billboard to or is there any other methods I can use to produce the effect I am after.

 

ps. I would make a playground but I don't know how to import textures. =)

[adam]

Why not use sprites for this?

http://www.babylonjs-playground.com/#12KWTV#5

[jerome]

The SPS is low-level system based on the mesh object. 

Therefore its internal billboard mode (billboard for its particles, not the whole mesh) is not managed by the engine and you have to call setParticles() in the render loop so each particle is billboarded (rotated) :http://doc.babylonjs.com/overviews/Solid_Particle_System#sps-creation

ex : http://www.babylonjs-playground.com/#WCDZS#7

[EDIT] Note : if you disable the particle rotation computation, the billboarding won't run... billboarding is rotating a particle.

As Adam said, if you are using only planar particles and not solid ones, the sprites could be a better option