Following up on the framerate vs shaders discussion I made some changes to the 
rendering
dialog and the way shaders are controlled. They are meant to make it easier for 
(new) users
to get nice framerates, while still allowing the eye-candy that they find 
important.

Some "highlights":

The snow line slider is moved to the Environment > Global Weather dialog.All 
shaders can be individually en-/disabled via the View > Shader Options 
dialog.Setting the Quality vs Performance slider to 0 will disable all shaders, 
with the 
exception of the tree shader.Trees can be toggled by a single checkbox click 
now. No need to fiddle around with
shaders to get them appear. I did came across a bug but that is not related to 
these
shader/dialog changes.Shader enable/disable properties and the quality-level 
are moved from sim/rendering 
to sim/rendering/shaders.

Some notes:
I changed some property names (see above), which obviously brakes some stuff. 
For 
example, aircraft that use the PersistentContrail effect need a little edit in 
their .eff
files.Now that the notorious "Material Shaders" option/property is removed, 
effects should
no longer refer to the /sim/rendering/shader-effects property. 
Instead, /sim/rendering/shaders/quality-level should be used instead. That will 
disable 
the effect when the quality-slider is set to 0.The (old) 3D clouds appear to be 
hardcoded. Right now they still check the old property
(/sim/rendering/shader-effects). Therefore, you will not see 3D clouds by 
enabling the
checkbox like it used to be. Local weather clouds works fine though. 

Because it breaks some stuff I decided to create a merge-request, so anyone can 
test and share
comments, ideas and patches. 

Here is the merge request: https://gitorious.org/fg/fgdata/merge_requests/122 

Enjoy!

Gijs

                                          
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