Hello,

I'm currently trying to do some really basic terrain rendering, actually simple, flat 2D terrain. Multitexturing seemed to be a nice compromise between simplicity and quality.

What I would like to obtain is be something like this :
http://img395.imageshack.us/my.php?image=terraintc3.jpg

This would be a "tile", or "ground cell" as I call it, with its own textures and alpha mask for the overlay texture.

The thing is, I would like to define my alpha mask as a very small texture (in the picture the mask was 32x32 pixels and was blurred after resize) so that I can load it on the fly and have a lot of tiles kept in memory. But having a small mask means having to resize it, and it's veery slow (at least using PImage.copy ). Doing it on the fly means having a big drop in framerate. And adding blurring on top of that is even worse.

The solution I found is making masks the size of a ground cell, already resized and blurred, but this means storing a lot of huge textures and big load times. I'm not really satisfied by this...

I also thought of using shaders to render the overlay texture, but that seemed a bit too complicated for something like this.

Does somebody have any idea or hint on this subject ? Is it possible to quicken the resizing/blurring of the mask ?


Thanks !

ps: the point is to make a simple seamless game world where terrain could load on the fly