scene fog and spe-particles cause crash

[mwfarb]

If any elements of https://github.com/supermedium/aframe-environment-component are set, they often enable fog behind the scenes, where fog > 0. In this state, adding any https://github.com/harlyq/aframe-spe-particles-component entity causes a runtime crash between the two particle emitter systems (env-presets vs. spe-particles).

• Quick mitigation is to set scene-options.env-presets.fog = 0, however that is unrealistic for new users.
• Slightly better would be to disable env-presets fog behind the scenes when spe-particles are present. Hackish, but realistic for new users. We could console log this setting to at least help awareness.
• aframe-environment-component has been updated recently, we could see if it helps. Unfortunately aframe-spe-particles-component has not been updated for six years, and we've modified it ourselves to work with newer THREE.js. Maybe it again needs another update for THREE.

[mwfarb]

@EdwardLu2018 The best solution, aside from rewriting the spe-particles for recent THREE, is to remove the conflict from the component settings automatically for all particles by setting affectedByFog from true to false .

"spe-particles": {"affectedByFog": false}