This is a paid asset, but now you can download Bakery Real-Time Preview for FREE, but please remember this package is provided only for learning purposes or to be able to test before buying the product, NOT FOR COMMERCIAL PURPOSES.
Detail this asset from Unity Store: Original Link
Bakery Real-Time Preview v1.191 (Latest version)
Bakery Real-Time Preview v1.18
Bakery Real-Time Preview v1.0
“If possible, please buy the package to support the developer”
Requires Bakery v1.71 or higher.
RTPreview is a real-time ray tracing plugin for Bakery Lightmapper that makes it possible to quickly visualize and tweak lighting for future lightmaps before baking them. RTPreview is not a production renderer, but a “how lightmapper sees your scene” kind of view. What you will see is what every traced ray sees in Bakery, meaning its main purpose is fine-tuning lighting and making sure your geometry and materials are properly represented. Similar to Bakery itself, RTPreview can take advantage of RTX hardware to render faster.
* Requires Bakery Lightmapper
* Documentation. make sure to read about functions and limitations
Update
Can you update to Latest version 1.191? Thank you!