mirror of
https://github.com/bevyengine/bevy.git
synced 2026-05-06 06:06:42 -04:00
Dylan Sechet
128450bdcc
# Objective Adds initial support for rectangle area lights, closing #7662. Implements Linearly Transformed Cosines ([Heitz et al, 2016](https://eheitzresearch.wordpress.com/415-2/)), with some tricks from [these slides](https://advances.realtimerendering.com/s2016/s2016_ltc_rnd.pdf) and [the reference implementation](https://github.com/selfshadow/ltc_code). ## Limitations There's currently no support for: - Anisotropic materials (there's [a follow-up paper](https://aakashkt.github.io/ltc_anisotropic.html) that shouldn't be too hard to implement on top of this, though) - Shadows - Textured lights - Clustering ## Testing - Compared results to eevee/cycles, see showcase section. - Ran the new example with `cargo run --example rect_light --features free_camera`, and made sure everythign works at grazing angles and from behind the light. - Clearcoat and transmission could probably use more testing, I just made sure nothing looked obviously broken. --- ## Showcase <img width="1919" height="941" alt="Showcase" src="https://github.com/user-attachments/assets/f506f05c-4869-4387-aeba-d16944497825" /> <img width="1919" height="941" alt="Screenshot From 2026-03-11 11-43-42" src="https://github.com/user-attachments/assets/c4a44903-784f-4c3e-bd44-84c3fe7bff29" /> Varying ground plane roughness: 
Release Content
This directory contains drafts of documentation for the current development cycle, which will be published to the website during the next release. You can find more information in the release notes and migration guides files.