Subtleties of animation…
Had to slice the effect sprite into fg/bg parts and put them on different layers. And synchronize everything manually 😓

End of part 1

Been fever-dreamin' some DIY material layering and light sources (before I get to the chapter 7 of the second book).

The amount of noise from emissive materials is.. ugh. Apparently this is why we bother with "light sources" instead of just dropping some light bulbs here and there.

The next week, starting from AABBs and BVH

162s -> 26s -> 19s
(for a bit more complex scene)

Cubes are harder than they appear!

Night is the time for experiments [with monadic material composition]

Found this little gem while testing UV generation code

So, you're telling me now we're gonna add noise to the scene?

BVH is love, BVH is life 📦

Ramped up samples, bounces, and resolution and the rendering time is still less than the first attemts with the linear traversal of all objects in the world.

Converting interaction event into a single-constructor with additive, multiplicative, and scatter components helped a little too.

Also, skipped ray bouncing when attenuation drops below 10-bit range.
The limit practically remains to prevent infinite bounces between perfect mirrors.

The cat is out of the box[Goral84]!

[Goral84]: Cindy M. Goral, Kenneth E. Torrance, Donald P. Greenberg, and Bennett Battaile. 1984. Modeling the interaction of light between diffuse surfaces. SIGGRAPH Comput. Graph. 18, 3 (July 1984), 213–222. https://doi.org/10.1145/964965.808601

Sorry for all the numerical instability...

The video illustrates the need for a frame debugger a la RenderDoc.
Bounce depth, hit angles, pixel variance, etc.

Leaves are green
But some of them blue
BVH debugging
I'm in you

130 -> 4844403 objects
7.5s -> 30s rendering time

Sponza: the final frontier. These are the pictures of the hobby ray tracer. Its five-year mission: to render good old worlds; to check out some shapes and test optimizations; to boldly go where I haven't gone before!

Fixed that Semigroup instance...