Hi,
To the above, I would add two comments:
- You should make a separate mesh, submesh or at least material for your glowing parts.
- Doing this will allow you to have more control over how these parts glow (and may affect surrounding materials/meshes). In particular, @tanpopo and @11128 are both correct in that the glowLayer uses the emissive (color and/or texture) to emit glow. This also means that this emissive color/texture can be affected by direct light. Separating your glowing meshes from your non-glowing meshes will allow you to set levels to the emissive and direct light for these parts. Typically you can ‘explode’ the level (emissiveIntensity or emissiveTexture.level in case of using a texture. Next to avoid these parts turning white when close and under direct light, you can compensate by setting the directIntensity (on PBR Mat) to a negative level. This way you can get very strong emissive/glow also in the distance.
Edit: Here’s the link to a thread that might be of interest to you: