version 4 is not coming for a long time, i'm currently and the upcoming months really busy.
The same for my addons.
but here is a fix for the ring nebula being too bright:
Code
NebulaModel "ring"
{
UseForObject "Ring Nebula"
UseForType "Planetary"
Method "Cylindrical"
Position (0 0 0)
Radius (1. 1. 1.)
BBoxRes (4 4 4)
useFBO 1
floatLOD 1
LODbase 50
FrontImage "ring.*"
SideImage "ringx.*"
emParticleColor (0.8, 1.4, 0.8)
absParticleColor (0.1, 0.1, 0.1)
emDetailR 1.0
emDetailZ 1.0
absDetailR 0.2
absDetailZ 0.2
emParticleDispR 0.4
emParticleDispZ 0.4
absParticleDispR 0.3
absParticleDispZ 0.3
emParticleSizeCenter 1.5
emParticleSizeEdge 2.0
absParticleSizeCenter 1.0
absParticleSizeEdge 1.0
emParticleMinBrightCenter 0.05
emParticleMinBrightEdge 0.05
absParticleMinBrightCenter 1.0
absParticleMinBrightEdge 1.0
emParticleBrightnessCenter 0.4
emParticleBrightnessEdge 1.5
absParticleBrightnessCenter 0.0
absParticleBrightnessEdge 0.0
clipRadius 0.977334
sumColor (221 255 169)
}