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How to destroy texture created by cacheasbitmap

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I have two sections on screen. when ever I am focusing on one section I am setting other sections cacheAsBitmap true. 

My problem is when ever I am toggling focus every time it is creating new texture and memory is going up. Is there a mechanism to delete texture created by cache as bitmap whenever I am setting cacheAsBitmap false? 

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here's where the texture is destroyed: 

If you are sure, go investigate it. I, even as pixi core team member, have no guarantees about cacheAsBitmap behaviour. Also, no guarantees about "generateTexture". People should just use "renderer.render(myContainer, myTemporaryRenderTexture)" after determining container bounds and transforms, all manually, making their own tests of whats working and whats not, because those functions are basically minefield, and so far, everyone who tried to disarm it failed.

That's one of reasons that no one repeated Flash platform - they cant make persistant cacheAsBitmap. If it works for you - fine, if not - go investigate your case with a debugger.

I' think Ive spent 100 hours on those kind of issues, and so far my PR's related to that were too monstrous to be added in pixi.

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