id	summary	reporter	owner	description	type	status	priority	milestone	component	resolution	keywords	cc	phab_field
6552	Grid pattern for deactivated shadow filtering	Langbart		"==== to reproduce
Start the random map `Anatolian Plateau` and look at the stone when toggling the option `Filtering` in the graphics settings under `Shadows`. See GIFs below for more clarity.

{{{
# Autostart
# You can also choose another map, but for consistent testing and comparison between different alphas, this map was chosen. 
binaries/system/pyrogenesis -conf=mod.enabledmods:""mod public"" -autostart=""random/anatolian_plateau"" -autostart-seed=999345625 -autostart-civ=1:cart
}}}

==== bisect
[25562]
[[Image(25562.jpg, 600px, center)]]


==== reproducible
===== A24b it is visible a little bit
[[Image(a24b.gif, 600px, center)]]

===== A25b it is very obvious
[[Image(a25b.gif, 600px, center)]]

===== latest GIT version [26913]
[[Image(rP26913_openGL.gif, 600px, center)]]



==== related
Investigation with elexis

{{{
[19:53:05] elexis only the environment.js affects that map
[19:53:22] elexis so it might be that the angle of the light now hits in such a way that makes it more obvious
[...]
[19:57:15] elexis the SunRotation line
[19:57:19] elexis that might have triggered it
[19:57:31] elexis elevation too I guess
[...]
[20:14:10] Langbart Taking the existing values and simply lowering ""SunElevation""  to 0.7 fixes the issue (mostly)
[...]
[20:15:24] Langbart as soon as you move the camera ...
[20:15:31] Langbart it itches a little bit, definitely noticeable
[20:15:52] elexis but thats not the root cause of the bug
[20:15:57] elexis the bug is the root cause of the bug
[20:16:02] elexis for any bug
[20:16:17] elexis it shouldnt matter how the angle is, so thats not a fix, thats just hiding the bug
[20:16:42] elexis the bug must either be a wrong texture, model, or shader
[...]
[20:33:31] Langbart I used those values that were introduced with 25562 for SunElevation, SunRotation and SunColor ... the problem could be reproduced with Alpha XXII, but as extremely visible with Alpha XXV 
[20:34:44] elexis it sounds like a shader/material thing
}}}

If you use the values before [25562] from the [https://code.wildfiregames.com/source/0ad/browse/ps/trunk/binaries/data/mods/public/maps/random/rmgen/environment.js$7 environment.js] file, the problem becomes less obvious (it hides the problem). See the image below for more clarity.
[[Image(hide_my_Problem.jpg, 600px, center)]]
"	defect	new	Should Have	Alpha 27	Art & Animation