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Howdy y'all! So, I installed Wings Over Europe via Steam, promptly updated it to the October 2008 patch, and fixed the stuttering by using the ENB patch for Skyrim (of all things). I also cribbed the DDraw.dll from the DgVoodoo install, which prevented the game crashing when pressing escape at the end of a mission. A couple of things to note here: - The renderer indicated in the options menu is not ENB, but my GPU still. Despite this, the game runs perfectly fine. - I turned the shadows down from Unlimited to High as I read on a forum post that this could help with z-fighting, but this did not solve the issue. I will turn it back up to Unlimited if it is all the same. - There are absolutely no other graphical issues in the sim what so ever, no matter the aircraft, time of day, or weather. The issue I am describing in the title appears like so in sim. I took three screenshots so you could see the way the dark boxes flicker on surfaces. It is not just aircraft, either, but also terrain. It seems to get culled in a circle as I turn my head with TrackIR: As you can see, my wingman gets periodically eaten by this weird black blob. I am at a loss as to how to fix it, and if it cannot be fixed, that's completely understandable given the Biblical age of the engine. Thanks in advance!

The shimmering of TODs and target objects and the flickering of shadows in the thirdwire game engine always anoyed me. And since I'm playing FE2 recently, there this problems are more intense,I decided to have a closer look at this issue and possible solutions. This is what I came up with: As many of you already know, the shimmering of the objects and flickering of shadows is caused by the limited precision of the z-buffer. The precision of the z-buffer depends (besides the buffers bit depth) on two values: the near clipping plane distance (znear) and the far clipping plane distance (zfar). To increase the z-buffer precision you have to shorten the interval[znear,zfar], either by decreasing zfar or by increasing znear. Whereby increasing znear is FAR more effective for increasing z-buffer precision. Changing zfar: I'm not quite sure what *.ini setting defines zfar. But I think that decreasing the horizon distance in the game options menu decreases zfar. But I found to see any (minor) effect (regarding reducing shimmering/flickering) I had to change the horizon setting to Near. But I like the horizon setting at Very Far and I will let it at Very Far. Changing znear: znear is defined in the flightengine.ini by FE2: [NearSceneClip] NearClipDistance= SF2 with object fading disabled (fading enabled I haven't investigated yet): [ForegroundSceneClip] NearClipDistance= But there is an exception: If in the <aircraft>_cockpit.ini OpenCockpit= is set to TRUE, then znear is defined by (the usually smaller value) ExternalClipDistMin=. Thats the reason why in some aircraft the shimmering happens, while in the external view it does not. The external view uses the flightengine.ini setting. The znear value has to be increased as much as possible. Unfortunately this value can not be increased arbitrary without side effects: e.g. clipping issues. You have to experiment until you find a maximum znear value without side effects. If you are lucky then the znear increase was sufficient to stop the shimmering/flickering. If not, then you have to tweak further. Tweaks against flickering shadows: Against the flickering shadows I don't know any tweaks. The only solution is to switch them off: Shadow option = High switches TOD shadows off, = Medium also switches target object shadows off. The following tweaks are meant to reduce the shimmering caused by z-fighting between the terrain and the TODs / target objects. What the tweaks do is to increase the z value distances between the terrain and the TODs / target objects. Tweak against shimmering TODs: In the <terrain>_data.ini set [solidObjectTextureMaterial] ZBufferOffset=2.0 or higher (in FE2 I set it to 5.0 to stop the shimmering) That modifies the z value by an offset so that the TODs are put a bit "forward" in the z-buffer. But this doesn't affect target objects shimmering. Tweak against shimmering target objects (and TODs). The solution I found is to modify the terrain shaders: TERTERRAINEFFECT.FX (near terrain) TERFARTERRAINEFFECT.FX (far terrain) TERWATEREFFECT0.FX (terrain with water, Water Detail = Low) TERWATEREFFECT1.FX (terrain with water, Water Detail = Medium) TERWATEREFFECT2.FX (terrain with water, Water Detail = High) In each shader I added the following lines in the vertex shader code const float zOffset = 3.0e-7; output.pos.z += zOffset * output.pos.w; That adds an offset to the z value so that the terrain is put a bit "back" in the z-buffer. This tweak ALSO affects TOD shimmering. But it has a side effect: The TOD / target object shadows are a bit shifted if viewed from greater distances. It's a tradeoff: choosing a greater zOffset value lessens the shimmering but shifts the shadows more and vice versa. You can try to decrease/increase zOffset in small steps (e.g. 1.0e-7) to see which offset fits best. The terrain shaders for FE2: fe2_zbufferoffset_shaders.zip Put the shader files (*.fx) into the Terrains\<terrain> directory. @admins/moderators: I also have modified SF2 shaders. But I don't know if the combatace policy allows to upload modified LOCKED shaders. Update: The terrain shaders for SF2: sf2_zbufferoffset_shaders.zip