Add metal spot textures for maps that lack them

[GoogleFrog]

Smoth has a widget and some images which draws metal spots. This widget could easily be adapted to draw metal spots for our maps which lack them.

https://springrts.com/phpbb/viewtopic.php?f=13&t=35575

[Anarchid]

Alternative: using the feature mexes like on yak maps and the recent sprung maps.

IIRC spring now supports a feature fade distance override, which would even allow them to be visible on zoomout.

Also, features support decals! While decals won't get rotated with the features themselves, that makes them usable for mexes.

[Anarchid]

I'm going to add decals to all existing feature mex thingies ("coral", "crystal", and "eldritch").

Is it better to modify maps with unmarked mexes themselves (if they are featured), or add a gadget to ZK?

[Licho1]

If gadget is 0 performance cost then gadget, otherwise modify maps imo.

[Anarchid]

Performance cost is equal in both cases.

Modifying maps inside ZK (like we do for metalmap overrides) is untidy but convenient because re-releasing maps is often uncomfortable.

[GoogleFrog]

Feature mexes have trouble conforming to terrain changes. The feature would have to be fairly small, maybe even invisible, and apply a ground decal.

[Anarchid]

Fair enough; pure decals can also work. But i don't think i've met a really bad case in the wild yet: the features are prevented from ever moving by being made non-colliding with everything, and to make the feature tilt, the middle vertex needs to be affected by deformation, which nobody wants to do because they want to build a mex there.

[GoogleFrog]

@Anarchid never did anything. I have added the widget.