Use this method if you need to batch draw a large number of Game Objects to this Render Texture in a single go, or on a frequent basis.
This method starts the beginning of a batched draw.
It is faster than calling
draw, but you must be very careful to manage the
flow of code and remember to call
endDraw(). If you don't need to draw large
numbers of objects it's much safer and easier to use the
draw method instead.
The flow should be:
// Call once: RenderTexture.beginDraw(); // repeat n times: RenderTexture.batchDraw(); // or RenderTexture.batchDrawFrame(); // Call once: RenderTexture.endDraw();
Do not call any methods other than
endDraw once you
have started a batch. Also, be very careful not to destroy this Render Texture while the
batch is still open, or call
This Render Texture instance.