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kattington

How to make FULL ALPHA HAIR ?

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Im trying to figure out how to make full alpha hair with no glitching issues. I have asked a creator or two that know the work around and who have come from the game called sims ( creating hair for that game too) and no one seems to be willing to give a helping hand. 

I understand that alpha masking is a piece of the puzzle. There must be something im missing. Vertice ordering ? Id like to know more about that.

In my reading and research, could be the order that we select the meshes before combining...?

Has anyone worn a full alpha texture hair and understood how its created to NOT glitch ? 

After asking hair creators who do know the answer and getting 0 help, I will ask here for more support.

Thank you for any input. 

 

 

Edited by kattington

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You can certainly use alpha masking mode if you wish.  That will avoid the alpha sorting problem.  If you use alpha blending mode, there's  no way to avoid it with something like hair because you will always have two 32-bit surfaces close enough to each other to confuse your graphics card.  The big drawback with alpha masking is that the cutoff is hard  Things are either visible or transparent, so you can't get some of the subtle grading that you'll get with alpha blending.  Personally, I tend to prefer updos for that reason.  They have fewer flyaway elements to deal with, and alpha blending still looks fairly good.

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thank you rolig for any input on this topic. ive noticed that with the alpha masking the cut off will tend to need to be up in the 200's for me.

Id love to figure out the work around for not using masking as this is something ive seen achieved and yet im scratching my head.  alpha blending with no glitches.

I appreciate your response. will check back later for more clues if any.

 

 

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You can't, not reliably.

Alpha sorting is an issue that exist with every realtime engine out there and the typical answer given to asset creators is usually along the lines of  "avoid layering alpha blended surfaces as much as you can".

 

Edited by Kyrah Abattoir
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21 hours ago, Kyrah Abattoir said:

You can't, not reliably.

Alpha sorting is an issue that exist with every realtime engine out there and the typical answer given to asset creators is usually along the lines of  "avoid layering alpha blended surfaces as much as you can".

Gonna need a big source on that. Alpha sorting is certainly not an unsolvable problem, especially not to the degree that it is in SL. Our rendering code is just a bit ancient, duct tape and all. (Doesn't help OP, but that's way too big of a claim to brush over.)

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You mean " avoid layering alpha blended surfaces as much as you can "?

Never did I say that you can't layer them, but if you solely rely on that to create the illusion of hair volume it will absolutely break, do remember that SL like every game, is realtime 3D, and a lot of the time it means we have to create the illusion of something , rather than making the thing because it's simply not computationally reasonable ( modeling and texturing the appearance of fur vs actually simulating individual fur hair )

There is a bunch of good examples here. http://wiki.polycount.com/wiki/HairTechnique.

A lot of hairpieces you see in videogames only use alpha blending at the very tip of hair strands and tufts, and use masking or no alpha at all for the rest of the haircut, but they also typically build haircuts as carefully textured volume+strands+tufts rather than just a "pile" of strands, and that is a skill that can take time to learn.

My advice would be to specifically look at what game dev studios do for their game characters and not what people do in SL because you can't assume that popular SL creators actually know what they are doing (business skills != art experience). Also many youtube tutorials are done by people who are not more experienced than you and are just eager to share what they just discovered/learned. Sadly, that tend to be how bad habits spread, and how their legitimacy is reenforced.

(I realize I sound like an ***** everytime I give advice but believe me I only want people to get better)

Edited by Kyrah Abattoir
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19 hours ago, janetosilio said:

There are a couple of hair makers that seem to have figured out a work around. I think that’s what’s shes referring to.

yes correct~ and they wont share lol.  so this is the crap im working with right now. Im interested in reading all your responces and thank you for the links and input. thank you.

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1 hour ago, kattington said:

yes correct~ and they wont share lol.  so this is the crap im working with right now. Im interested in reading all your responces and thank you for the links and input. thank you.

Can you share examples of these brands with alpha sorting workarounds? Deconstructing how they're built shouldn't be too difficult.

Edited by Wulfie Reanimator

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