Multiview shaders.
Refactor Frustum management
Rewrite shared shadow map
cull mask should respect stereo
Stereo savegame screencap
LocalMap refactoring
use the vertex buffer hint instead of the display list patch to enable/disable display lists
Character preview fixes
Fixes a regression in which pass lighting was clamped after being passed
to fragment shader. For correct FFP emulation, we need to clamp the result
in vertex shader. When clamping after interpolation, negative lights in
particular have a much more drastic effect.