Worms: Open Warfare 2 - ULUS10260

[Hykem]

Any update on this regression by chance? I've tried messing around with settings quite a bit but no matter what I try the bug persist - the whole screen has a constant wave motion.

To sum up issue histroy: Issue first appeared in r2167 - fixed in r2288 - broke again in r2323 - issue present in all revisions after that.

Please try to take a look at this when you can! Thanks!

I'm still watching this issue closely, but it has been quite hard to determine the exact cause of this behaviour.
So far, I'm sure the issue relies on our stencil test, but this game seems to only output proper graphics under a wrong stencil case, which is obviously not the correct implementation.
By the way, could you please check if this behaviour persists in all maps on this game (with shader stencil test on vs. shader stencil test off)? I believe there's one map that doesn't produce this bug, but for unknown reasons.

Ok, glad to hear it! Weird issue it sounds like.

There's only 2 maps that don't have this affect but those two don't have water. All the other ones exhibit this behavior.

With "Stencil Test" on, the whole game has a huge rendering issue. See screenshot. Is there other settings that "Stencil Test" does not get along with? Despite the craziness, I can make out (at times when landscape displays) that the wave effect is still present with this enabled.

So no effect either way and if affects all levels with water (which is 90% of them). At least you got it narrowed down pretty well. You'll figure it out.

Thanks for the detailed report!
Enabling the Stencil Test shouldn't yield any problems, but I've seen some cases where there have been some graphical issues when resizing, for instance. It may also share issues with certain optimization features like the Vertex Cache for example. The best way to test it is by just enabling the shaders and the stencil test and keep the display at 1x size.
This issue looks indeed quite odd, but I think it's starting to make some sense.
It appears the water layer is being rendered on top of the landscape when it is present. When our stencil test was always allowing write operations based on depth, the landscape was always drawn. Now, the water shows up, but the landscape is omitted.
Looks like we will have to test the stencil depth test feature and check if it's affecting this game. If so, a proper shader implementation will be needed.