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Updates to popup windows:

git-svn-id: http://svn.uktrainsim.com/svn/openrails/trunk@274 a9f3cfff-6c41-7446-b0ca-052bd761e6eb

Reverting V272 as it broke the shader techniques in a subtle way.

git-svn-id: http://svn.uktrainsim.com/svn/openrails/trunk@273 a9f3cfff-6c41-7446-b0ca-052bd761e6eb

Caching of EffectTechniques which gives a modest perf boost.

git-svn-id: http://svn.uktrainsim.com/svn/openrails/trunk@272 a9f3cfff-6c41-7446-b0ca-052bd761e6eb

Small improvement to headlights shader code.

git-svn-id: http://svn.uktrainsim.com/svn/openrails/trunk@271 a9f3cfff-6c41-7446-b0ca-052bd761e6eb

Tidy up some of the C#-shader joining code.

Optimise shadow rendering with cached non-shadow stencil buffer and optimised Clear() call. Up to 20% faster with shadows.

git-svn-id: http://svn.uktrainsim.com/svn/openrails/trunk@270 a9f3cfff-6c41-7446-b0ca-052bd761e6eb

Allow steam NumCylinders to be zero.  Seems to be used for cars with special effects.

git-svn-id: http://svn.uktrainsim.com/svn/openrails/trunk@269 a9f3cfff-6c41-7446-b0ca-052bd761e6eb

Tweak shadow map VSM rendering to put 4x anisotropic filtering in and reduce numerical error patterns.

git-svn-id: http://svn.uktrainsim.com/svn/openrails/trunk@268 a9f3cfff-6c41-7446-b0ca-052bd761e6eb

Optimise scenery shader parameters for fog and headlights.

Fix train headlights to not be infinitely powerful - they work up to 100m now.

Day2Night transition now also fades out shadow effect for better night-time working.

git-svn-id: http://svn.uktrainsim.com/svn/openrails/trunk@267 a9f3cfff-6c41-7446-b0ca-052bd761e6eb

Display graphics adapter name and memory in debug F5 info.

Reduce excessive memory usage by shadow map by requesting preserve contents (share render target and texture memory) and only creating one RT/stencil buffer instead of one per RenderFrame.

git-svn-id: http://svn.uktrainsim.com/svn/openrails/trunk@266 a9f3cfff-6c41-7446-b0ca-052bd761e6eb

Fix shadow map rendering to work better at night (everything shadowed).

git-svn-id: http://svn.uktrainsim.com/svn/openrails/trunk@265 a9f3cfff-6c41-7446-b0ca-052bd761e6eb