topic How to invert an alphamap in Hypershade in Maya Forum

How to invert an alphamap in Hypershade

Anonymous — Sat, 16 Jun 2018 10:46:43 GMT

Hey Guys,

I'm new to Maya but worked with Blender in a long time. I'm currently trying to understand the Hypershade in Maya 2018, but have some problems: How can I invert an alpha map, like a specular map? In Blender you've just set an invert node between the texture and the shader, but this doesn’t seem to work the same way in Maya. There is the reverse node, that kind of invert the colours, but I don’t know how to use this. I can’t just plug it in between the alpha map and the aiStandartSurface. Why not? How does this work?

P.S. Sorry for my bad English

Re: How to invert an alphamap in Hypershade

sean.heasley — Mon, 18 Jun 2018 14:50:02 GMT

Hi @Anonymous

You can use the Color Correct node and plug the alpha texture into it. From there you can tweak the Alpha Offset which should reverse the opactiy values.

Please let me know if this helps or if you need any more assistance!

If one or more of these posts helped answer your question, please click Accept as Solution on the posts that helped you so others in the community can find them easily.

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Re: How to invert an alphamap in Hypershade

sean.heasley — Wed, 20 Jun 2018 14:59:05 GMT

Hi @Anonymous

I'm just checking in again to see if you need more help with this. Did the suggestion I provided on Monday work for you?

If so, please click Accept as Solution on the posts that helped you so others in the community can find them easily.

Re: How to invert an alphamap in Hypershade

Anonymous — Wed, 08 May 2019 13:08:28 GMT

In the file texture node you can select invert. See image.

Re: How to invert an alphamap in Hypershade

Anonymous — Fri, 31 Jan 2020 13:56:47 GMT

Thx!

Simple and effective solution xD

But I still don't understand why Maya sees my alpha map for hairs as an inverted texture?
When I plug it in other software everything runs smoothly and without any problem.

Re: How to invert an alphamap in Hypershade

patrick.schock — Tue, 16 Feb 2021 10:29:33 GMT

Hello @Anonymous,

it is the way how Maya is interpreting the alpha channel for hair, black is used for opaque and white for transparency:

Hair card textures are inverted in color upon rendering [maya]

Best regards,

Patrick

Re: How to invert an alphamap in Hypershade

enea.arki4KUK9 — Sun, 28 Jul 2024 04:21:07 GMT

look like most the node with that tab "effect" have invert function. ty for pointing out that man. learn new thing

Re: How to invert an alphamap in Hypershade

alberto_drawing — Sun, 20 Oct 2024 17:49:06 GMT

Hello, I know this post is little old, but if you still need it or is helpful, you can use the REVERSE node in case you need to connect into another attribute, regards