[PATCH] Improved Shadow Filter

[aeonios]

I replaced the PCF box filter with an 8 sample poisson disk filter. It should produce noticeably smoother shadows.

[Stan]

Hey aeonios,

Thanks for working on this :) If you are not aware all patches should now be uploaded to code.wildfiregames.com in order to be reviewed :)

Look at the wiki for more information.

Thanks for the patch. Do you have any before/after screenshots ?

[aeonios]

Alright I'm set up on phabricator now and uploaded this patch. I probably need to be set up to be included in auto-build though.

No screenshots yet. Technical difficulties. :P Will make some soon though.

[aeonios]

Fixed an error that occurs with some drivers if you don't specify .r for the result of shadow2D.

[s0600204]

Hi, we're in feature freeze right now, and this looks to be non-critical. Thus, I'm bumping this back to Alpha 24.

If you feel this is incorrect, and that this change must be included in Alpha 23, please provide your reasoning.

Thank you for your contribution to 0 A.D.!

[Imarok]

Move tickets to their correct component.

[Stan]

Backlogging due to lack of progress. I updated the Phab diff as it was merged with another one.