I’m noticing that refreshing the bitmapdata on bitmapTextures is a big hit in mobile performance.

So I would like to make the dynamic part of the texture low-res and the static part (the ground) high-res.

The only way that I can accomplish this, as far as I can see, is by merging the high- and low-res textures bitmapData and sending that to the texture, but as mentioned, this cause some frame-dropping.

My guess is because the textures has to get send to the GPU and that takes some time?

Is there any better/faster way?