master_vol
This variable allows you to set the general volume of the mixer; this way you won't have to change sound_vol, midi_vol and cdaudio_vol when you want to increase / decrease the volume in your application.
Panels with the "filter" flag
The new "filter" flag blurrs scaled panels, making them look better
bmap test_pcx = <test.pcx>;
panel test_pan
{
bmap = test_pcx;
scale_x = 5;
scale_y = 5;
flags = refresh, visible, filter;
}

The entities have got text strings
Two text strings can be assigned to entities under Wed's entity properties.
Models with multiple textures
Models now support multiple textures, which can be assigned to different parts of the mesh.