Openra: Add voxel rotor to TS Harpies

[tovl]

In light of #18231 the current sprite rotor on Harpies won't do anymore. Because the original failed to add the rotor which it should have had (which was incredibly sloppy of westwood) we will have to add custom artwork for this.

We will also have to add support for voxel overlays to the engine, which I think will be good to have for modders anyway.

[pchote]

I'm really not a fan of this idea - the voxel rotors that i've seen implemented in various mods IMO generally look worse than no rotor at all.

I explicitly accounted for this in #18231 and chose pitch/roll angles that are large enough to be noticeable, but small enough to still look fine with the sprite rotor.

[tovl]

I explicitly accounted for this in #18231 and chose pitch/roll angles that are large enough to be noticeable, but small enough to still look fine with the sprite rotor.

This is exactly the reason why I opened this issue, because that's just a terrible cop-out and we shouldn't be constrained like that.

I'm really not a fan of this idea - the voxel rotors that i've seen implemented in various mods IMO generally look worse than no rotor at all.

We have some pretty talented modelers in this community, I'd be interested to see what ideas they might have.

[dnqbob]

I agree with @tovl because of this:

The Harpy is not only has rotor, and they can slide swiftly.

This is from the CG of destroying the MKII, and there are many other CGs also contain this Harpy has rotor that fly&die in swiftness.

In this case, Westwood probably wanted to apply rotor, and if possible I think they will also apply slide&roll to their aircrafts. But there must be something stop them from doing that. Maybe it was the technical problem they couldn't solve, or the unspeakable horror hides in their deadline.

and probably we can solve it

[reaperrr]

In my opinion, the only kind of voxel rotors that I see a chance of looking good would be ones that make proper use of OpenRA's more flexible transparency support, to make truly translucent, blurry (i.e., more realistic) animated rotors.

RA2-Blackhawk-style animated rotors are b*tt-ugly, in my opinion, I'd rather stick to what we have than go down that route.

[ABrandau]

I am a bit out of the loop of this discussion, but I rendered a bigger version of the rotor yesterday, let me know if this is of help to you.

And for the landed version, please mind you this gif comes from before i downsize the rotor, right now it has the same size as the rotor above.

[pchote]

LGTM, although IMO its a couple of px too big - it appears to be clipping the tail, whereas the fmv shot above implies it should stop a little short of it.