AGK for Pascal
TAgkScene.Render Method

Draws all sprites and text objects to the current frame buffer. It does not swap the backbuffer to the screen.

class procedure Render; static;

You usually don't have to call this method since it is called automatically during each frame loop. However, you need to manually render the scene if you want to create a screen shot (using TAgkImage.ScreenShot). 

It does not draw sprites you have created using pointers, you will either have to draw them individually or assign them to a sprite manager to batch draw them. In this case Render should still be called as it also updates device rotation settings.

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