Maya/Verge3D Transparency - where is Alpha Clip option

This topic has 4 replies, 2 voices, and was last updated 2 years, 4 months ago by tojekvfx.

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2022-06-28 at 12:38 am #53684

tojekvfx
Customer

Hello Verge3D,
I am doing a chair with a mesh back that gets transparency from the alpha channel of my color map, much as you describe in the documentation. It works fine when Alpha Mode is set to Mask, but looks a little pixelated. When I try Alpha Mode = Blend, the z-buffer surface ordering gets broken, even when setting negative numbers for the surface rendering order. Then I see other packages and your nice transparency app using “Alpha Clip” as a great solution. Where can I find this Alpha Clip option in my aiStandarSurface? Or any other suggestions to make this nice clean transparency.
Jon Tojek

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2022-06-28 at 8:04 am #53696

Mikhail Luzyanin
Staff

Alpha Clip the same as Alpha Mask, just different naming in different software. To get corners smoother just increase the resolution of the image used as mask.

Co-founder and lead graphics specialist at Soft8Soft.

2022-06-28 at 7:14 pm #53726

tojekvfx
Customer

Hello Mikhail,
Thank you for responding, and now I understand, Alpha Mode Mask in Maya is the same as Alpha Mode Clip in some of the other packages. Honestly I wish I could use Alpha Mode Blend as you show in the Verge3D documentation, but because my chair model is trying to be light with only 8 surfaces, some that are in front and behind others it seems not possible to get each Render Order number correct to make them stack and appear correct in webGL.

Please do say if you have any other ideas for that one.
Sincerely, Jon Tojek

2022-06-29 at 7:53 am #53742

Mikhail Luzyanin
Staff

tojekvfx wrote:

but because my chair model is trying to be light with only 8 surfaces, some that are in front and behind others it seems not possible to get each Render Order number correct to make them stack and appear correct in webGL.

Unfroutunally that’s how the blend mode works, it’s good for simple (plane like) models without multiple intersections in view. Try also alpha coverage (aka alpha hashed), otherwise the only solution is to use alpha mask with hight resolution texture.

Co-founder and lead graphics specialist at Soft8Soft.

2022-06-29 at 3:57 pm #53756

tojekvfx
Customer

Yes, that all makes sense, thank you Mikhail.
JonT
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