The Broccoli project

[wilbertvandenbroek]

This project I did at work to get a better understanding of photogrammetry and realistic rendering.
I used Reality Capture to scan all the broccoli pieces, I did the water splash with Max liquid and added a few bubbles by poly painting them.
The steam/vapour was added in photoshop.

[wilbertvandenbroek]

Clay renders and scene

[wilbertvandenbroek]

Scan procces

[romullus]

Looks nice, but don't you know that Corona already has tool for broccoli rendering - it's called Corona fractal :]

[sprayer]

maybe would better to have motion blur at  frying broccoli ?

romullus  it is very slow and buggy with materials. I was asked Ondra to fix it but he is too busy for stuff like that

[maru]

The bubbles on top of the water have wrong IOR, unless they are oil bubbles like when babushka is cooking some chicken soup.

[wilbertvandenbroek]

You're right they have the same ior as the water they are in. Missed that one :-)

[agentdark45]

You're right they have the same ior as the water they are in. Missed that one :-)

Quick question here, what IOR should the bubbles be? Are the bubbles not just a film of water with air underneath, therefore also close to 1.33?

I guess this brings me to my next question, what's the best way of approaching bubbles in 3D? Should be we shelling the bubble mesh (as opposed to a solid sphere), and what about intersections with the water mesh?

[maru]

The "true" way of modelling bubbles would be making them intersections. Sphere inside the main water object = bubble.

The "fake" way would be adding a sphere on top of the water surface and giving it IOR like 1,01 or so (it should then look like very thin refractive surface).

[romullus]

I think that simplest, yet physically plausible way would be like this - set IOR to 1,0 or very close and fresnel IOR to 1,33. I didn't test that though and can't guarantee that it works :]

Ninja'd by maru

[maru]

I think that simplest, yet physically plausible way would be like this - set IOR to 1,0 or very close and fresnel IOR to 1,33. I didn't test that though and can't guarantee that it works :]

Ninja'd by maru

That should do more or less the same thing as setting refraction mode to thin, which is also a valid solution (however the bubbles should probably have _some_ thickness to their walls).

[wilbertvandenbroek]

Thanks for the insights for this.

[maru]

By the way, doesn't "The Broccoli Project" sound like some super secret government experiment? UFO research, propulsion engines, ai denoisers...

[wilbertvandenbroek]

....