<div>If forceClear is true, the depth, stencil and color buffers will be cleared before rendering even if the renderer's autoClear property is false.</div>
<div>Even with forceClear set to true you can prevent certain buffers being cleared by setting either the .autoClearColor, .autoClearStencil or .autoClearDepth properties to false.</div>
<div>Reads the pixel data from the renderTarget into the buffer you pass in. Buffer should be a Javascript Uint8Array instantiated with new Uint8Array( renderTargetWidth * renderTargetWidth * 4 ) to account for size and color information. This is a wrapper around gl.readPixels.</div>