| 23 Oct 2021 |
 wazabear_notabear#7403 | https://gamedev.stackexchange.com/questions/82046/how-do-professional-games-avoid-showing-pixel-seams-in-adjacent-mesh-boundaries | 04:39:00 |
 CMAugust#6575 | 
Download screenshot442.png | 04:39:03 |
| CMAugust#6575 | Interesting, it doesn't bother to chunk default cells. | 04:39:03 |
| CMAugust#6575 | That link looks handy. | 04:42:50 |
| wazabear_notabear#7403 | It's a whole topic in of itself, osgEarth actually implemented an algorithm to mitigate the seams as described here (between LOD) http://wscg.zcu.cz/wscg2007/Papers_2007/full/C43-full.pdf | 04:46:45 |
| CMAugust#6575 | Oh, wow | 04:47:04 |
| CMAugust#6575 | I wonder if that can be useful at all for OpenMW. | 04:47:13 |
| wazabear_notabear#7403 | http://shiny-dynamics.blogspot.com/2010/08/terrain-engine-for-osgearth.html | 04:47:19 |
| wazabear_notabear#7403 | I haven't read any of it, so don't know how much is actually useful. | 04:47:51 |
| wazabear_notabear#7403 | The seams I'm seeing definitely aren't between LOD levels though, they are two adjacent chunks right in my face. | 04:49:59 |
| CMAugust#6575 | Yeah. | 04:50:21 |
| CMAugust#6575 | BTW, did you figure out the best way forward for your sky shader MR? I'm missing it especially after speeding up the weather transitions. lol | 04:51:40 |
| wazabear_notabear#7403 | Not touched it in a while. | 04:52:58 |
| CMAugust#6575 | ah... | 04:54:17 |
| wazabear_notabear#7403 | * It's a whole topic in of itself, osgEarth actually implemented an algorithm to mitigate the seams as described here (between LOD) http://wscg.zcu.cz/wscg2007/Papers_2007/full/C43-full.pdf | 05:03:11 |
 vtastek | it happens in Morrowind too.
it is just sky showing up. I think we can make the bottom sky darker, it will become less visible. | 09:46:02 |
| CMAugust#6575 | There's a few broken things in OpenMW only, namely the ashstorm/blight weather transition. | 09:49:17 |
| CMAugust#6575 | Waz's sky shader MR WIP has fixed them already, just needs to be finished. | 09:50:23 |
 AnyOldName3#5223 | One thing that might make a difference is how the scenegraph's structured. If we've got one transform at the root of the terrain system and all the terrain chunks have their vertices specified in a common space, then we'd be running the same vertices through the same matrices and producing the same edges, so should have them always agree, and therefore have no gaps. If we've got each chunk having its own transform between it and the terrain root, then we're putting different vertices through different matrices, and it's expected that they won't produce the exact same results.. With the former approach, we're more likely to see things like terrain shaking when a long way away from the world root, though.
Hacky fixes that immediately spring to mind include moving the vertices along the chunk boundaries away from the chunk centre by an epsilon or setting a clear colour closer to the average terrain colour so the gaps are less visible. | 12:06:42 |
| CMAugust#6575 | Unrelated: man, I wish someday OpenMW better supported billboards. | 12:17:30 |
 Tauin | maybe with better oblivion nif support? | 12:20:28 |
 wareya | moving the vertices along the chunk boundaries away from the chunk centre by an epsilon
this is basically the same as what I suggested earlier; it would work | 12:20:32 |
| Tauin | the only thing i can think of is when you want the billboard to face the camera but not care about the z axis | 12:22:50 |
| CMAugust#6575 | The relevant issue: https://gitlab.com/OpenMW/openmw/-/issues/2366 | 12:25:26 |
 MaladjustedPlatypus#1938 | How is that artificial whiteness added? Is it something that can be modified or masked to not be a whole ring? Just having a partial removal of the white ring makes the ripples considerably nicer https://www.shadertoy.com/view/ldfyzl | 12:25:29 |
| wareya | the vec3(abs(rainRipple.w)) terms at the end of the shader | 12:25:30 |
| wareya | yeah in theory i guess but it would be kind of awkward | 12:31:28 |
| vtastek | I removed it immediately, i don't think anyone will miss it. | 13:15:30 |
 Foal (Mads) | Would love to see it finished. The lack of sky/weather shaders is blocking full GL_OVR_MultiView support. Is there a lot of work remaining on the MR? | 14:01:03 |
| wazabear_notabear#7403 | Need to verify how morrowind does weather particle lighting, and there is still the bug with one of our stateupdaters which causes non-rain to flicker at start of transition. Latter isn't a blocker though as it's an existing bug. | 14:29:57 |
