Specular Edges Appearing on Rounded Meshes

[Ven]

I've been getting this weird lighting error for a while now, ever since I started manually breaking apart my models to make UV unwrapping simpler. In this case I broke up the following SRB into 8 sections and then rotated and mirrored tha new sections to complete the cylinder. When imported into Unity, however, the seams are visible when specular is enabled.

The textures are mirrored, so this problem shouldn't be caused by the texture, but rather the model.

I've removed the normal map, so that isn't causing the problem either.

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Thanks for reading~

[landeTLS]

Man ven. You are a way better texture artist than me so im not sure how much i can contribute here.

First im going to assume you are using a baked speculear map. it doesnt look like you didnt merge doubles after mirroring but then again you didnt mention it. Perhaps you used the mirror modifier in blender that does that for you?

but if the issue lies in the spec map i guess id suggest baking your spec map after adding a circulear array(if youre using blender) so your object looks like it will when complete while baking. Since baking is dependent on geometry flow, any edges(like on a 90degree cone segement) will catch highlights etc. Near those edges that would not be there on the completed(360 degree part) i use circulear arrays but ive seen some people use rotated duplicates while baking too.

Anyway. For repeating/tiling textures on cylinders/cones it might be a good idea to use arrays instead of mirrors as the resulting uvs and geometry will be arranged going in one direction But im not an expert on the subject

Edited March 7, 2015 by landeTLS

[CaptainKipard]

Are you sure the mesh is manifold?

Is there a normal map?

[Van Disaster]

Hard edges? you sure everything is welded properly after your mirror operation?