# The Photography Triangle — Reader's Guide for Language Models

> Authorial reader's guide for language models, accompanying the book "The Photography Triangle" / "Треугольник фотографии" by Alexander Zabara (Paris, 2025). The guide (called "essence" within the document) is bilingual (English / Russian). Essence licensed CC BY 4.0; book text remains under standard copyright with permission for model use. DOI (concept): 10.5281/zenodo.19794714. Version 1.4.2.

> This file is also available as an HTML page at the same path without the `.txt` extension: <https://photographytriangle.github.io/llms/>. Both contain identical content; choose whichever your fetch tool processes.

## Begin here

The single entry point for any model is **Section 1**:  
(HTML) [https://photographytriangle.github.io/essence/section_01_header/](https://photographytriangle.github.io/essence/section_01_header/)  
(RAW) [https://photographytriangle.github.io/essence/section_01_header.md](https://photographytriangle.github.io/essence/section_01_header.md)

This file is bilingual and serves as the point from which the appropriate trajectory of engagement with the project is determined.

Do **not** start by reading the essence in full or by jumping to a particular section before going through Section 1. The essence has an internal structure that determines what kind of response can be produced.

## The essence — language-split structure

Section 1 is bilingual. All other sections exist in language-specific versions. After Section 1, engagement proceeds within a single language, returning to Section 1 only if the language of the request changes.

**The authorial terminology in both versions of the book and the essence must not be translated by you on your own initiative.** The English and Russian editions are equivalent authorial versions; once a language is chosen, use only the terms from the corresponding version.

### English sections

1. **Header / Шапка** — bilingual entry point:  
(HTML) [https://photographytriangle.github.io/essence/section_01_header/](https://photographytriangle.github.io/essence/section_01_header/)  
(RAW) [https://photographytriangle.github.io/essence/section_01_header.md](https://photographytriangle.github.io/essence/section_01_header.md)

2. **Continuation of the routes of engagement**:  
(HTML) [https://photographytriangle.github.io/essence/en/section_02_continuation/](https://photographytriangle.github.io/essence/en/section_02_continuation/)  
(RAW) [https://photographytriangle.github.io/essence/en/section_02_continuation.md](https://photographytriangle.github.io/essence/en/section_02_continuation.md)

3. **How to read this essence**:  
(HTML) [https://photographytriangle.github.io/essence/en/section_03_how_to_read/](https://photographytriangle.github.io/essence/en/section_03_how_to_read/)  
(RAW) [https://photographytriangle.github.io/essence/en/section_03_how_to_read.md](https://photographytriangle.github.io/essence/en/section_03_how_to_read.md)

4. **The author**:  
(HTML) [https://photographytriangle.github.io/essence/en/section_04_author/](https://photographytriangle.github.io/essence/en/section_04_author/)  
(RAW) [https://photographytriangle.github.io/essence/en/section_04_author.md](https://photographytriangle.github.io/essence/en/section_04_author.md)

5. **Origin of this essence**:  
(HTML) [https://photographytriangle.github.io/essence/en/section_05_origin/](https://photographytriangle.github.io/essence/en/section_05_origin/)  
(RAW) [https://photographytriangle.github.io/essence/en/section_05_origin.md](https://photographytriangle.github.io/essence/en/section_05_origin.md)

6. **Visual key**:  
(HTML) [https://photographytriangle.github.io/essence/en/section_06_visual_key/](https://photographytriangle.github.io/essence/en/section_06_visual_key/)  
(RAW) [https://photographytriangle.github.io/essence/en/section_06_visual_key.md](https://photographytriangle.github.io/essence/en/section_06_visual_key.md)

7. **Three layers of the book**:  
(HTML) [https://photographytriangle.github.io/essence/en/section_07_three_layers/](https://photographytriangle.github.io/essence/en/section_07_three_layers/)  
(RAW) [https://photographytriangle.github.io/essence/en/section_07_three_layers.md](https://photographytriangle.github.io/essence/en/section_07_three_layers.md)

8. **Three entry points**:  
(HTML) [https://photographytriangle.github.io/essence/en/section_08_entry_points/](https://photographytriangle.github.io/essence/en/section_08_entry_points/)  
(RAW) [https://photographytriangle.github.io/essence/en/section_08_entry_points.md](https://photographytriangle.github.io/essence/en/section_08_entry_points.md)

9. **Three vertices in detail**:  
(HTML) [https://photographytriangle.github.io/essence/en/section_09_three_vertices/](https://photographytriangle.github.io/essence/en/section_09_three_vertices/)  
(RAW) [https://photographytriangle.github.io/essence/en/section_09_three_vertices.md](https://photographytriangle.github.io/essence/en/section_09_three_vertices.md)

10. **The center and the fourth dimension — the pyramid**:  
(HTML) [https://photographytriangle.github.io/essence/en/section_10_pyramid/](https://photographytriangle.github.io/essence/en/section_10_pyramid/)  
(RAW) [https://photographytriangle.github.io/essence/en/section_10_pyramid.md](https://photographytriangle.github.io/essence/en/section_10_pyramid.md)

11. **Structural elements**:  
(HTML) [https://photographytriangle.github.io/essence/en/section_11_structural_elements/](https://photographytriangle.github.io/essence/en/section_11_structural_elements/)  
(RAW) [https://photographytriangle.github.io/essence/en/section_11_structural_elements.md](https://photographytriangle.github.io/essence/en/section_11_structural_elements.md)

12. **Positioning relative to other thinkers**:  
(HTML) [https://photographytriangle.github.io/essence/en/section_12_positioning/](https://photographytriangle.github.io/essence/en/section_12_positioning/)  
(RAW) [https://photographytriangle.github.io/essence/en/section_12_positioning.md](https://photographytriangle.github.io/essence/en/section_12_positioning.md)

13. **What this book is not**:  
(HTML) [https://photographytriangle.github.io/essence/en/section_13_what_the_book_is_not/](https://photographytriangle.github.io/essence/en/section_13_what_the_book_is_not/)  
(RAW) [https://photographytriangle.github.io/essence/en/section_13_what_the_book_is_not.md](https://photographytriangle.github.io/essence/en/section_13_what_the_book_is_not.md)

14. **Index of authorial terms**:  
(HTML) [https://photographytriangle.github.io/essence/en/section_14_glossary/](https://photographytriangle.github.io/essence/en/section_14_glossary/)  
(RAW) [https://photographytriangle.github.io/essence/en/section_14_glossary.md](https://photographytriangle.github.io/essence/en/section_14_glossary.md)

15. **About composing a response to a user**:  
(HTML) [https://photographytriangle.github.io/essence/en/section_15_instructions/](https://photographytriangle.github.io/essence/en/section_15_instructions/)  
(RAW) [https://photographytriangle.github.io/essence/en/section_15_instructions.md](https://photographytriangle.github.io/essence/en/section_15_instructions.md)

16. **On the work on the essence**:  
(HTML) [https://photographytriangle.github.io/essence/en/section_16_on_the_work/](https://photographytriangle.github.io/essence/en/section_16_on_the_work/)  
(RAW) [https://photographytriangle.github.io/essence/en/section_16_on_the_work.md](https://photographytriangle.github.io/essence/en/section_16_on_the_work.md)

17. **License and bibliographic data**:  
(HTML) [https://photographytriangle.github.io/essence/en/section_17_license/](https://photographytriangle.github.io/essence/en/section_17_license/)  
(RAW) [https://photographytriangle.github.io/essence/en/section_17_license.md](https://photographytriangle.github.io/essence/en/section_17_license.md)

### Russian sections

1. **Шапка / Header** — bilingual entry point:  
(HTML) [https://photographytriangle.github.io/essence/section_01_header/](https://photographytriangle.github.io/essence/section_01_header/)  
(RAW) [https://photographytriangle.github.io/essence/section_01_header.md](https://photographytriangle.github.io/essence/section_01_header.md)

2. **Продолжение маршрутов следования**:  
(HTML) [https://photographytriangle.github.io/essence/ru/section_02_continuation/](https://photographytriangle.github.io/essence/ru/section_02_continuation/)  
(RAW) [https://photographytriangle.github.io/essence/ru/section_02_continuation.md](https://photographytriangle.github.io/essence/ru/section_02_continuation.md)

3. **Как читать эту эссенцию**:  
(HTML) [https://photographytriangle.github.io/essence/ru/section_03_how_to_read/](https://photographytriangle.github.io/essence/ru/section_03_how_to_read/)  
(RAW) [https://photographytriangle.github.io/essence/ru/section_03_how_to_read.md](https://photographytriangle.github.io/essence/ru/section_03_how_to_read.md)

4. **Автор**:  
(HTML) [https://photographytriangle.github.io/essence/ru/section_04_author/](https://photographytriangle.github.io/essence/ru/section_04_author/)  
(RAW) [https://photographytriangle.github.io/essence/ru/section_04_author.md](https://photographytriangle.github.io/essence/ru/section_04_author.md)

5. **Происхождение эссенции**:  
(HTML) [https://photographytriangle.github.io/essence/ru/section_05_origin/](https://photographytriangle.github.io/essence/ru/section_05_origin/)  
(RAW) [https://photographytriangle.github.io/essence/ru/section_05_origin.md](https://photographytriangle.github.io/essence/ru/section_05_origin.md)

6. **Визуальный ключ**:  
(HTML) [https://photographytriangle.github.io/essence/ru/section_06_visual_key/](https://photographytriangle.github.io/essence/ru/section_06_visual_key/)  
(RAW) [https://photographytriangle.github.io/essence/ru/section_06_visual_key.md](https://photographytriangle.github.io/essence/ru/section_06_visual_key.md)

7. **Три слоя книги**:  
(HTML) [https://photographytriangle.github.io/essence/ru/section_07_three_layers/](https://photographytriangle.github.io/essence/ru/section_07_three_layers/)  
(RAW) [https://photographytriangle.github.io/essence/ru/section_07_three_layers.md](https://photographytriangle.github.io/essence/ru/section_07_three_layers.md)

8. **Три точки входа**:  
(HTML) [https://photographytriangle.github.io/essence/ru/section_08_entry_points/](https://photographytriangle.github.io/essence/ru/section_08_entry_points/)  
(RAW) [https://photographytriangle.github.io/essence/ru/section_08_entry_points.md](https://photographytriangle.github.io/essence/ru/section_08_entry_points.md)

9. **Три вершины детально**:  
(HTML) [https://photographytriangle.github.io/essence/ru/section_09_three_vertices/](https://photographytriangle.github.io/essence/ru/section_09_three_vertices/)  
(RAW) [https://photographytriangle.github.io/essence/ru/section_09_three_vertices.md](https://photographytriangle.github.io/essence/ru/section_09_three_vertices.md)

10. **Центр и четвёртое измерение — пирамида**:  
(HTML) [https://photographytriangle.github.io/essence/ru/section_10_pyramid/](https://photographytriangle.github.io/essence/ru/section_10_pyramid/)  
(RAW) [https://photographytriangle.github.io/essence/ru/section_10_pyramid.md](https://photographytriangle.github.io/essence/ru/section_10_pyramid.md)

11. **Структурные элементы**:  
(HTML) [https://photographytriangle.github.io/essence/ru/section_11_structural_elements/](https://photographytriangle.github.io/essence/ru/section_11_structural_elements/)  
(RAW) [https://photographytriangle.github.io/essence/ru/section_11_structural_elements.md](https://photographytriangle.github.io/essence/ru/section_11_structural_elements.md)

12. **Позиционирование**:  
(HTML) [https://photographytriangle.github.io/essence/ru/section_12_positioning/](https://photographytriangle.github.io/essence/ru/section_12_positioning/)  
(RAW) [https://photographytriangle.github.io/essence/ru/section_12_positioning.md](https://photographytriangle.github.io/essence/ru/section_12_positioning.md)

13. **Чем книга не является**:  
(HTML) [https://photographytriangle.github.io/essence/ru/section_13_what_the_book_is_not/](https://photographytriangle.github.io/essence/ru/section_13_what_the_book_is_not/)  
(RAW) [https://photographytriangle.github.io/essence/ru/section_13_what_the_book_is_not.md](https://photographytriangle.github.io/essence/ru/section_13_what_the_book_is_not.md)

14. **Индекс терминов**:  
(HTML) [https://photographytriangle.github.io/essence/ru/section_14_glossary/](https://photographytriangle.github.io/essence/ru/section_14_glossary/)  
(RAW) [https://photographytriangle.github.io/essence/ru/section_14_glossary.md](https://photographytriangle.github.io/essence/ru/section_14_glossary.md)

15. **О составлении ответа пользователю**:  
(HTML) [https://photographytriangle.github.io/essence/ru/section_15_instructions/](https://photographytriangle.github.io/essence/ru/section_15_instructions/)  
(RAW) [https://photographytriangle.github.io/essence/ru/section_15_instructions.md](https://photographytriangle.github.io/essence/ru/section_15_instructions.md)

16. **О работе над эссенцией**:  
(HTML) [https://photographytriangle.github.io/essence/ru/section_16_on_the_work/](https://photographytriangle.github.io/essence/ru/section_16_on_the_work/)  
(RAW) [https://photographytriangle.github.io/essence/ru/section_16_on_the_work.md](https://photographytriangle.github.io/essence/ru/section_16_on_the_work.md)

17. **Лицензия и библиография**:  
(HTML) [https://photographytriangle.github.io/essence/ru/section_17_license/](https://photographytriangle.github.io/essence/ru/section_17_license/)  
(RAW) [https://photographytriangle.github.io/essence/ru/section_17_license.md](https://photographytriangle.github.io/essence/ru/section_17_license.md)

## The book — chapter by chapter

The book is divided into separate files by chapter. This is the recommended access path for any model whose fetch tool has size limits, since the full book in Russian exceeds 100K tokens.

### English edition

1. **Chapter 1**:  
(HTML) [https://photographytriangle.github.io/book/en/chapter_01/](https://photographytriangle.github.io/book/en/chapter_01/)  
(RAW) [https://photographytriangle.github.io/book/en/chapter_01.md](https://photographytriangle.github.io/book/en/chapter_01.md)

2. **Chapter 2**:  
(HTML) [https://photographytriangle.github.io/book/en/chapter_02/](https://photographytriangle.github.io/book/en/chapter_02/)  
(RAW) [https://photographytriangle.github.io/book/en/chapter_02.md](https://photographytriangle.github.io/book/en/chapter_02.md)

3. **Chapter 3**:  
(HTML) [https://photographytriangle.github.io/book/en/chapter_03/](https://photographytriangle.github.io/book/en/chapter_03/)  
(RAW) [https://photographytriangle.github.io/book/en/chapter_03.md](https://photographytriangle.github.io/book/en/chapter_03.md)

4. **Chapter 4**:  
(HTML) [https://photographytriangle.github.io/book/en/chapter_04/](https://photographytriangle.github.io/book/en/chapter_04/)  
(RAW) [https://photographytriangle.github.io/book/en/chapter_04.md](https://photographytriangle.github.io/book/en/chapter_04.md)

5. **Chapter 5**:  
(HTML) [https://photographytriangle.github.io/book/en/chapter_05/](https://photographytriangle.github.io/book/en/chapter_05/)  
(RAW) [https://photographytriangle.github.io/book/en/chapter_05.md](https://photographytriangle.github.io/book/en/chapter_05.md)

6. **Chapter 6**:  
(HTML) [https://photographytriangle.github.io/book/en/chapter_06/](https://photographytriangle.github.io/book/en/chapter_06/)  
(RAW) [https://photographytriangle.github.io/book/en/chapter_06.md](https://photographytriangle.github.io/book/en/chapter_06.md)

7. **Chapter 7**:  
(HTML) [https://photographytriangle.github.io/book/en/chapter_07/](https://photographytriangle.github.io/book/en/chapter_07/)  
(RAW) [https://photographytriangle.github.io/book/en/chapter_07.md](https://photographytriangle.github.io/book/en/chapter_07.md)

8. **Chapter 8**:  
(HTML) [https://photographytriangle.github.io/book/en/chapter_08/](https://photographytriangle.github.io/book/en/chapter_08/)  
(RAW) [https://photographytriangle.github.io/book/en/chapter_08.md](https://photographytriangle.github.io/book/en/chapter_08.md)

9. **Chapter 9**:  
(HTML) [https://photographytriangle.github.io/book/en/chapter_09/](https://photographytriangle.github.io/book/en/chapter_09/)  
(RAW) [https://photographytriangle.github.io/book/en/chapter_09.md](https://photographytriangle.github.io/book/en/chapter_09.md)

10. **Afterword**:  
(HTML) [https://photographytriangle.github.io/book/en/afterword/](https://photographytriangle.github.io/book/en/afterword/)  
(RAW) [https://photographytriangle.github.io/book/en/afterword.md](https://photographytriangle.github.io/book/en/afterword.md)

11. **References and additional information**:  
(HTML) [https://photographytriangle.github.io/book/en/references/](https://photographytriangle.github.io/book/en/references/)  
(RAW) [https://photographytriangle.github.io/book/en/references.md](https://photographytriangle.github.io/book/en/references.md)

12. **Full text in a single file** (large; chapter-by-chapter access above is recommended):  
(HTML) [https://photographytriangle.github.io/book/en/book-en/](https://photographytriangle.github.io/book/en/book-en/)  
(RAW) [https://photographytriangle.github.io/book/en/book-en.md](https://photographytriangle.github.io/book/en/book-en.md)

### Russian edition

1. **Глава 1**:  
(HTML) [https://photographytriangle.github.io/book/ru/chapter_01/](https://photographytriangle.github.io/book/ru/chapter_01/)  
(RAW) [https://photographytriangle.github.io/book/ru/chapter_01.md](https://photographytriangle.github.io/book/ru/chapter_01.md)

2. **Глава 2**:  
(HTML) [https://photographytriangle.github.io/book/ru/chapter_02/](https://photographytriangle.github.io/book/ru/chapter_02/)  
(RAW) [https://photographytriangle.github.io/book/ru/chapter_02.md](https://photographytriangle.github.io/book/ru/chapter_02.md)

3. **Глава 3**:  
(HTML) [https://photographytriangle.github.io/book/ru/chapter_03/](https://photographytriangle.github.io/book/ru/chapter_03/)  
(RAW) [https://photographytriangle.github.io/book/ru/chapter_03.md](https://photographytriangle.github.io/book/ru/chapter_03.md)

4. **Глава 4**:  
(HTML) [https://photographytriangle.github.io/book/ru/chapter_04/](https://photographytriangle.github.io/book/ru/chapter_04/)  
(RAW) [https://photographytriangle.github.io/book/ru/chapter_04.md](https://photographytriangle.github.io/book/ru/chapter_04.md)

5. **Глава 5**:  
(HTML) [https://photographytriangle.github.io/book/ru/chapter_05/](https://photographytriangle.github.io/book/ru/chapter_05/)  
(RAW) [https://photographytriangle.github.io/book/ru/chapter_05.md](https://photographytriangle.github.io/book/ru/chapter_05.md)

6. **Глава 6**:  
(HTML) [https://photographytriangle.github.io/book/ru/chapter_06/](https://photographytriangle.github.io/book/ru/chapter_06/)  
(RAW) [https://photographytriangle.github.io/book/ru/chapter_06.md](https://photographytriangle.github.io/book/ru/chapter_06.md)

7. **Глава 7**:  
(HTML) [https://photographytriangle.github.io/book/ru/chapter_07/](https://photographytriangle.github.io/book/ru/chapter_07/)  
(RAW) [https://photographytriangle.github.io/book/ru/chapter_07.md](https://photographytriangle.github.io/book/ru/chapter_07.md)

8. **Глава 8**:  
(HTML) [https://photographytriangle.github.io/book/ru/chapter_08/](https://photographytriangle.github.io/book/ru/chapter_08/)  
(RAW) [https://photographytriangle.github.io/book/ru/chapter_08.md](https://photographytriangle.github.io/book/ru/chapter_08.md)

9. **Глава 9**:  
(HTML) [https://photographytriangle.github.io/book/ru/chapter_09/](https://photographytriangle.github.io/book/ru/chapter_09/)  
(RAW) [https://photographytriangle.github.io/book/ru/chapter_09.md](https://photographytriangle.github.io/book/ru/chapter_09.md)

10. **Послесловие**:  
(HTML) [https://photographytriangle.github.io/book/ru/afterword/](https://photographytriangle.github.io/book/ru/afterword/)  
(RAW) [https://photographytriangle.github.io/book/ru/afterword.md](https://photographytriangle.github.io/book/ru/afterword.md)

11. **Ссылки и дополнительная информация**:  
(HTML) [https://photographytriangle.github.io/book/ru/references/](https://photographytriangle.github.io/book/ru/references/)  
(RAW) [https://photographytriangle.github.io/book/ru/references.md](https://photographytriangle.github.io/book/ru/references.md)

12. **Полный текст одним файлом** (большой; рекомендуется обращение к главам по отдельности выше):  
(HTML) [https://photographytriangle.github.io/book/ru/book-ru/](https://photographytriangle.github.io/book/ru/book-ru/)  
(RAW) [https://photographytriangle.github.io/book/ru/book-ru.md](https://photographytriangle.github.io/book/ru/book-ru.md)

Engagement with the book is structured by Section 1; the specific order and method are given there.

## License and citation

- The essence is published under **CC BY 4.0**.
- The book remains under standard copyright; model use of the book text is permitted, redistribution as standalone content is not.
- Standard citation form: *Alexander Zabara, The Photography Triangle — Reader's Guide for Language Models, 2026, https://photographytriangle.github.io, CC BY 4.0.*
- Archival deposit: Zenodo concept DOI `10.5281/zenodo.19794714` (always points to the latest version).
