How To Paint: Lense Gemming
In the Heat Sink tutorial I mentioned that glow effects are really common in 40k paint schemes but see less use in Battletech so let's look at something that I frequently see go the other way- flat painted gem effects for lenses. These work well for Battletech energy weapons, but they can also be used for sensor clusters, glass eyepieces on things like a space marine helmet, or jewels on a more fantasy inspired mini. There's a variety of ways to do these- gem or contrast paints over a metallic base coat, gloss varnish, or just splashing the area with a little color all work just fine- but today I'm going to go over my basic recipe for a green reflective glass effect.
For as much of a love/hate relationship as I have with GW citadel paints their color system is remarkably good at getting proper highlight colors for things like this- I'm largely cribbing my color choices here from the old Duncan Rhodes videos and you can feel free to sub out for whatever colors work best for your particular project.
Citadel Caliban Green (dark green)
Citadel Warpstone Glow (green)
Citadel Moot Green (light green)
Army Painter Matt White (titanium white)
Once you've completed the area around whatever you want to gem, start by painting this with your darkest color. Here we'll be using our dark Caliban Green, focusing on the Starslayer's two large lasers. If a little gets on the rim around the lense at this step that's fine.
Once your dark green is dry, take a very small brush and thin down your mid-tone green. Choose one of the bottom 'corners' of the lense and start carefully applying paint there. Ideally, we want to paint a 'crescent moon' shape centered on that corner, with a fatter middle section and thinner tips, leaving the darker green visible in the lense center and one of the upper corners. If the detail proves to small or your hand-eye coordination is too unwieldy for this, sketching a 'C' shape or simply putting a diagonal line thru the lense and coloring the lower half with your light color will also work at this scale.
Next, take your light green color and thin it with your smallest brush. Very carefully apply a thin line of this color along the outer edge of the area you painted with your green midtone.
Finally, apply a small dot of pure white to the upper corner of the lense that remains dark green.
And the gemming is done! Once you get the basic idea down you'll find that this is a pretty versatile technique (I use a variation of it for canopy glass as well). Definitely worth giving a try, and if you aren't a fan then like I said there's plent of other things to do to achieve similar results.