Capturing a 3D product configuration as an image for customer quotes

A configurator's quote must show the exact product the customer built, so a plain spec list falls short and the rendered canvas should be captured. Calling toDataURL directly usually produces a blank image, because WebGL clears the drawing buffer after each frame. One fix is to enable preserveDrawingBuffer on the renderer, which is simple but carries a small per-frame performance cost. A better option for configurators that render only on change is to render a fresh frame and read it within the same tick. For higher-resolution output, the renderer can be temporarily resized for capture and then restored. The resulting image can be sent to a backend and included in the quote alongside the price and lead time.