What are Voxels? - Speedy Houdini

In this video, we're briefly covering the topic of Voxels. In computer graphics, voxels are used for various purposes. In Houdini, we use them for volumes. Understanding what they are, helps us utilize them to their fullest.

[@puchingballz]

Q: At 4:55 you said that voxels can store scalar data from ranges 0-1, is that for the density specifically or voxels can't store negative values as scara data? If this is true can they hold /or how do they handle information of 32bit float channel pictures, like displacement maps, etc.? Those ranges exceed -1/1 domain

[@NineBetween]

Hey! Sorry about the confusion, I was talking about density specifically, where it is usually in a range between 0 and 1. Even with density, that isn't a hard and fast rule. To clarify, a scalar is a single component value that may be an integer (negative or positive counting number) or a float (negative or positive decimal values). A vector is a multicomponent value. You can think of it as being made up of three scalars. Vector volumes can definitely hold negative values. For example, velocity often falls into a negative range. Sorry about the confusion. Thanks for the question!

[@megan.p34]

Explanation of basic terms of Houdini is really important for begginers like me I wish there would be more ! Can't wait for the next :)

[@YasirKhan-kn4xg]

Was going through the Voxel -CRF model for 3D scene understanding ....but didn't understand wtf VOXel's R ..! But thanks to U man ...hatsof

[@leighaston1]

i highly recommend this channel for learning houdini ... its one of the best out there for learning the basics ... and the basics are the building blocks for the advanced ...

[@leighaston1]

there is a great transition going on in the industry as many port over from maya and other softwares to houdini ... so the explanation of the basics is golden ... i have been a 3d artist since the late 80s ... 35 years .. prolly one of the oldest longest standing 3d artists in the world ... started in soho london back in the day ... thank you this channel for your sharing of knowledge ... it is greatly appreciated

[@litote9]

Good to know an old dog can learn new tricks, given I'm no puppy myself

[@dirtcreature3d]

Y’all make awesome houdini content!

[@arturobandini8164]

It's interesting to know, even for those who have been in the topic for a long time.

[@TheSatzy6699]

Excellent content and explanation

[@dyjm1799]

That's awesome!

[@truongle7872]

nice vid!

[@altamashkhan5870]

That's why nine between us the goat the goat really you are the bestt

[@1polygonewithme]

cool video but im ready for the next HIP

[@wahidlaaleg8315]

can u do a video about kine fx??

[@SevenDeMagnus]

Hi, so a cube made of polygons with 8 quads is technically a voxel?

[@NineBetween]

Hi, not quite. It's about the "hollowness" of it. Think of a cube made of polygons as a thin mesh, almost as if it were made of paper. Whilst a voxel is volumetric in nature, ie. The inside of it contains data. Think of a pixel in 2d. A pixel is a filled in block of data, not just an outline of a square. I hope that is clearer for you

[@johneygd]

So voxels are real 3D right?

[@prltqdf9]

Pixel = picture element. Voxel = volumetric picture element.

[@djaccount5458]

Hello, you show 3d cubes not voxels?

[@GreedoShot]

what the fuck is houdini