What if you just push the emissiveTexture level (since you have one) a hell of lot (i.e. 20)
Edit: In this (rushed) PG, I looked at the ‘cat sign’ (or better said, modified materials of name “Mat_Neon_Atlas_2” and “Mat_Neon_Atlas_1”
Edit: And then actually, one thing I sometimes do as a designer’s trick is that I add a glow (or blur) to my emissiveTexture. And then I explode my emissiveTexture.level (not the emissiveIntensity, else it would turn white) Sometimes with this I don’t even use the gl or hl layers (for saving performance) but I mostly use it just to enhance the FX and enhance it in the distance
Edit1: Sorry, just edited the PG. Forgot that you need to compensate the directIntensity else when you come close to a sign with direct light, the texture will turn white.