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## 6.4 Some final comments

- If you want the timeout value to be "forever" then you can specify a 0 as the timeout value (or leave the parameter blank). To regenerate the image you will have to remove the image files from the cache. This removal could for example be handled by a nightly cron-job
- If you use images where you have enabled the anti-aliasing you should strongly consider using caching since anti-aliasing is quite time consuming compared to standard line drawings.

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