> For the complete documentation index, see [llms.txt](https://dazhizhong.gitbook.io/pixray-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://dazhizhong.gitbook.io/pixray-docs/advanced.md).

# Advanced

- [Empirical testing - comparing output quality](https://dazhizhong.gitbook.io/pixray-docs/advanced/empirical-testing-comparing-output-quality.md)
- [Developing a custom loss](https://dazhizhong.gitbook.io/pixray-docs/advanced/developing-a-custom-loss.md)
- [Developing a custom drawer](https://dazhizhong.gitbook.io/pixray-docs/advanced/developing-a-custom-drawer.md)
- [Developing a custom image filter](https://dazhizhong.gitbook.io/pixray-docs/advanced/developing-a-custom-image-filter.md)
- [Developing a function video movement](https://dazhizhong.gitbook.io/pixray-docs/advanced/developing-a-function-video-movement.md)
- [Modifying Pixray](https://dazhizhong.gitbook.io/pixray-docs/advanced/modifying-pixray.md)