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Cast Shadows on surface but not lighting?

Home › Forums › Graphics / Maya › Cast Shadows on surface but not lighting?

Viewing 8 posts - 1 through 8 (of 8 total)
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  • 2021-08-17 at 10:50 am #43691
    KurtGR
    Customer

    Hi guys, so I currently have a environment sphere setup which has a flat bottom being used as a ground plane – now normally I’d use a surface shader to apply the HDRI texture to the “sky” so that it stays unaffected by directional lighting, but I also wants shadows to cast on the ground (I’ve tried aishadowmatte but it seems this is only intended for AR).

    Here’s an image of what I mean^ essentially I need the “lightless” functionality of a surface shader, but also the ability to cast shadows on the ground – I know these are opposing ideas, and I tried the aiShadowMatte, but it didn’t work out. Any ideas?

    2021-08-18 at 11:29 am #43720
    Mikhail Luzyanin
    Staff

    aiShadowMatte must work in all scene types not only in AR, I think the problem may be in shadow parameters or sphere normals.

    Co-founder and lead graphics specialist at Soft8Soft.

    2021-08-18 at 2:27 pm #43729
    KurtGR
    Customer

    I can get the aishadowmatte to project a shadow – but it projects it onto full transparency, penetrating all meshes behind it (revealing the aiskydome) – in this scene, I have a skysphere that I’d like visible under it, is this possible?

    2021-08-19 at 8:22 am #43756
    Mikhail Luzyanin
    Staff

    You can change Alpha Opacity to get a shadow transparent.

    Co-founder and lead graphics specialist at Soft8Soft.

    2021-08-20 at 1:04 pm #43870
    KurtGR
    Customer

    It’s not the shadows I need transparent, the actual shadowmatte is transparent and it hides my skysphere if that makes sense? (I want to see the ground below, not the aiskysphere)

    https://youtu.be/YWeXuLvjCn4- Shown here

    2021-08-23 at 7:58 am #43911
    Mikhail Luzyanin
    Staff

    Try to set Alpha type Opaque for the material with environment texture.

    Co-founder and lead graphics specialist at Soft8Soft.

    2021-09-10 at 2:17 pm #44511
    KurtGR
    Customer

    Hi, sorry for not getting back sooner but I was working on something else for a bit – I’ve tried setting the surfaceshader to opaque but i’m getting the same problem :( – any other ideas?

    2021-09-25 at 6:56 am #45232
    Mikhail Luzyanin
    Staff

    Can you share the source files?

    Co-founder and lead graphics specialist at Soft8Soft.

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