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경
경화28762489jk35
Participant
February 15, 2024
Question

shadow issue with alpha

  • February 15, 2024
  • 1 reply
  • 1318 views

The shadow of the object to which the alpha map is applied is the output as modelled. For example, if you apply a circular alpha texture to a square plane, the shadow comes out as a square rather than a circle.
As I inquired through chat with Adobe, he offered me a solution to get rid of modelling that square.
All my characters would lose their hair if I followed this advice.If it was an attempt to be funny, it was a success though, Adobe needs to train his staff so they can at least understand what the problem is.

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1 reply

Cyril Dellenbach
Community Manager
Cyril DellenbachCommunity Manager
Community Manager
February 15, 2024

Hello @경화28762489jk35,

 

Thanks for your message.

 

Could you share a screenshot of the issue you're facing, so I can have better idea on what's happening? What rendering application are you using?

 

Let me know.

Cyril Dellenbach (Micro) | QA Support Artist | Adobe
경
경화28762489jk35Author
Participant
February 15, 2024
Hi,
Could you help me, please?
This is 2024 version.
Here is the screenshot
Cyril Dellenbach
Community Manager
Cyril DellenbachCommunity Manager
Community Manager
February 19, 2024

Oh, my god...

Adobe needs to train his staffs. 

 

I hope you can see the top of this page.  "home > substance 3D painter ".

Guess what program I'm using. 

And... I attached screenshot. You can't notice it is real time view? 

Moreover, top of the right on the image, there is a small word  "material".  You could notice it is not rendering.

view. 

 

And a snowflake further away in the box has the correct shadow, and a snowflake closer to the correct one doesn't have the right shadow. The planes are same props and same ao texturae. 

 


I understand the frustration, but most artists don't render with Iray considering it doesn't give a lot of control to the user, and shadows (expects for specific maps like AO) aren't defined by textures. Texturing with Painter and rendering with a tier app is a really common thing, hence my question. If the first image is indeed the viewport of Painter, the second one (where the issue occurs) doesn't have any info on this regard. In addition, if the problem comes from the viewport (not Iray), you have to known the 3D viewport has many limitations due to real time needs. Therefore, I would check if the issue persists in my rendering software.

 

That being said, I maintain this issue probably comes from the AO map. Not from the planes AO, but the package AO. When baking the map, due to the proximity between the plane and the package, the baking will add shadows on the package itself, just behind the plane. It also make sense that a further away object wouldn't share the same issue, because the further apart the objects are, the fewer occluded areas there will be.

You can try to remove the AO map from the package, and check if the issue persists.

 

Keep me updated.

Cyril Dellenbach (Micro) | QA Support Artist | Adobe
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