Scatter Tests

[OnoSendai]

ok thanks - hey, can I use this moment to restate my request for a hair primitive? seems like it would go hand-in hand with this new stuff!

So you can make hairy mountains?

[FakeShamus]

ha! I was thinking more like rolling grassy hills... with maybe a fuzzy stanford bunny frolicking around.

[CTZn]

ok thanks - hey, can I use this moment to restate my request for a hair primitive? seems like it would go hand-in hand with this new stuff!

Ticket #520 got bumped !

The hair primitive requires a tip and base radii, plus interpolation power between those. Expectedly hairs would be caped (closed volumes).

Anything you would like to add on the feature ? Here's your post 1 year ago for reference:
http://www.indigorenderer.com/forum/vie ... 24#p112324

[FakeShamus]

They could be closed volumes or flat, I guess, depending on what you need them for. And having some sort of texture-based or ISL control of the scattering (exactly what reminded me of it above) and direction of the hairs, as well as texture or ISL based coloring. for example, each hair would inherit the color of whatever point on the surface they are being scattered from. Blender already has a lot of these options for hair, so I'm mostly thinking in terms of translating that into Indigo.

[CTZn]

Yes, basically hair systems are instances individually deformed by an assigned input curve. Since the exported curves are at the basis of the system it makes sense to introduce curve based primitives at an earlier stage.

This is being OT, sorry Nick

[neo0.]

Hehe it's not terragen, but its looking pretty neat. Was it rendered with sun/sky. It would be pretty cool if we could make things like this in indigo

[wlf_alex]

With trees and atmospheric scattering

Rendered over night.

When these tools are available in indigo (cindigo)?

[OnoSendai]

With trees and atmospheric scattering

Rendered over night.

When these tools are available in indigo (cindigo)?

We're still deciding exactly how they should work. Having said that it might not be too long.

[CTZn]

With trees and atmospheric scattering

Rendered over night.

When these tools are available in indigo (cindigo)?

We're still deciding exactly how they should work. Having said that it might not be too long.

Please consider adding a min and max scattering distances, each optional. I'm not sure wether the distance should be in world scale or relative to the target density...

[OnoSendai]

Please consider adding a min and max scattering distances, each optional. I'm not sure wether the distance should be in world scale or relative to the target density...

Distance from what?

[PureSpider]

From each instance to each other, I assume.

[CTZn]

Yes, the distance between points, because hairs have a much more caracteristic distribution than trees do.

Granted, a valid solution might be different than I suggested. and edit: a voronoi distribution would do the job I assume.

[galinette]

Yes, the distance between points, because hairs have a much more caracteristic distribution than trees do.

Granted, a valid solution might be different than I suggested. and edit: a voronoi distribution would do the job I assume.

Voronoi is a tesselation algorithm based on a point distribution, it is not a point distribution!

For hair, Poisson Disk distribution rules, it's not the simplest, but there are dozens of papers about it.

Etienne

[CTZn]

Ah I understand, much appreciated !

Hold on, poissons have no hairs !!!

[OnoSendai]

Some fully procedural grass tests.
Made from some parametric surfaces in a patch, then scattered over the ground plane.

This is just using a simple diffuse material, so obviously the final thing will look much better!