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Why am I having unusual issues with shadows not casting correctly?

Hi Guys,

Firstly, I'm importing meshes from 3ds Max as FBX.

Im having an unsual issue with setting up a direct light. It's not casting shadows correctly.

As far as I know I've set the light map correctly given the spot light appears to creating some good GI. Incidently, I'm getting some odd diagonal shadows as shown, also, the meshes have a white line through them as if they're not properly attached).

Im hoping someone can help me with this issue as it appears to be common with all the models I've tried.

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asked Aug 22 '14 at 12:32 PM in Rendering

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Some basic stuff you could try: -Improving light map resolution in the static mesh editor. -Have a light mass importance volume surrounding your scene. -Check if UV's are imported correctly (also inside static mesh editor).

If that doesn't help, please upload the meshes.

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answered Aug 24 '14 at 10:41 PM

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avatar image Tim Hobson ♦♦ STAFF Aug 25 '14 at 08:46 PM

As Roel has suggested improving the lightmap resolution can help along with good UVs.

  • The image with the window and the diagonal lines looks directly related to UVs. Can you post an image of the UVs for this?

With the mesh with the white line make sure that the meshes are overlapping a little bit as this will help alleviate any light bleed like this you are seeing.

avatar image Mr.Snrub Aug 26 '14 at 02:43 AM

Thanks guys. Lightmass importance was set.

Also thanks for for the white line mark comments.

Unfortunately, the power went out while I was working on it! I've since tried another mesh and it seems to be working ok. I think it had something to do with normals, although I was sure they were correct.

avatar image Tim Hobson ♦♦ STAFF Aug 26 '14 at 06:48 PM

If you're still having the issue later on feel free to post here and I'll help you look into it. :)

avatar image Mr.Snrub Aug 27 '14 at 01:49 AM

Thanks mate. Much appreciated.

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