how simply writing text on texture
My program (still in testing stage / learning for now) displays a multitude of colored tiles symbolizing values. I use a texture where each pixel corresponds to a tile, then apply the texture on a mesh. I would like to have now, is create a second texture (substantially larger of course) where writing these values to display over the previous texture, only when I want. that is to say that the two do not necessarily beings displayed simultaneously. in short, I'm looking and looking again, I can not find an explanation of "how to write in a texture or renderTexture" ... I expected was that it's rather simple, as in a conventional 2D library ...
the only thing I seem to find, would display it on the screen, and then save it to a texture via a camera ... is not it a bit complicated and "heavy"? are there no other solutions like: "text.write (texture)" or "renderTexture.draw(text)" ??
thank you in advance for your answers ^^.