Page 25/36 [TODO] TGLPFXRenderer PFX renderer is a helper object which has to present in the scene so any object can have Effects  properly functioning. The system works like this: PFX manager describes settings for the effect, scene object has the  effect in  Effects  list and PFX renderer takes care about rendering particles. This seems to be too complicated but it is very flexible. Environment objects By   default   background   color   of   the   scene   is   light   gray.   The   color   is   defined   by SceneViewer.Buffer.BackGroundColor property. If you want other background than uniform color use environment object. TGLEarthSkyDome [TODO] TGLSkyDome Sky dome creates gradients of color stripes along horizontal plane. You can make as many stripes as you want. You can add small dots in Stars list. Stars can even glitter. TGLSkyBox Sky box is a large cube with inverted normals and six textures covering whole skyline. The textures must align each to another and create panoramic illusion. HUD objects HUD   is  Heads  Up  Display.  These   objects   are   rendered   as   bitmaps   on   screen.   Their position is defined only by X and Y values. X is horizontal and Y is vertical position of HUD object. The origin [0,0] point is upper left corner. You do not have to care about rendering order of HUD objects (only among each other), they always get rendered last. TGLHUDSprite Universal HUD object. Displays bitmap on the screen. Use material library to store the texture. Transparent textures are often used. Texture should have power of two dimensions. You can rescale the size of the object with its  Width  and  Height  values. HUD sprite can turn around center with Rotation property. TGLHUDText This HUD object displays characters in its  Text  property. How is the text displayed is determined by GLScene font component. GUI objects GUI objects are described in TGLGUILayout section. GLScene beginner's guide, Jan Zizka, 2005