| Bug ID | 93767 |
|---|---|
| Summary | Glitches with soft shadows and MSAA in Knights of the Old Republic 2 |
| Product | Mesa |
| Version | git |
| Hardware | Other |
| OS | All |
| Status | NEW |
| Severity | normal |
| Priority | medium |
| Component | Drivers/Gallium/radeonsi |
| Assignee | dri-devel@lists.freedesktop.org |
| Reporter | daniel@constexpr.org |
| QA Contact | dri-devel@lists.freedesktop.org |
Created attachment 121127 [details] Screenshot of the glitch When enabling both soft shadows and antialiasing in Knights of the Old Republic 2 [0], there are lines visible in addition to the shadows. Here is an apitrace showing the problem: http://constexpr.org/tmp/KotOR2-shadows-radeonsi.trace.xz (37 MiB) The same trace (and the game) render fine with Catalyst 15.12. Disabling either soft shadows or antialiasing also fixes the rendering. GPU: Radeon HD 7950 (TAHITI) Mesa 11.2.0-devel (git-d018619) LLVM r255414 >From what I can tell the problem first appears in e.g. draw call 1919333 in my trace - the stencil buffer has value 127 everywhere except for parts covered by the shadow volumes. The color buffer however contains jagged lines afterwards in addition to the pixels covered by the shadows. NB: The game also has fog issues like those worked around in the ATI_fs implementation [1] for the first KotOR game, but they are also present with Catalyst and even in one of the official screenshots [2] on the game's Steam store page. I think its fair to assume that that is a game bug, but if anyone wants to try it out with another driver / HW, here is another apitrace: http://constexpr.org/tmp/KotOR2-fog-radeonsi.trace.xz (35 MiB) [0] http://store.steampowered.com/app/208580/ [1] http://lists.freedesktop.org/archives/mesa-dev/2015-December/103263.html [2] http://cdn.akamai.steamstatic.com/steam/apps/208580/ss_e2043ae5d872d5576fd160acb3aa1169a5d0222c.1920x1080.jpg?t=1451421385
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