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Trouble with intersections and normal maps.

interpolator
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Udjani interpolator
For the first image, lets say i want to bake that detail into my lp, and i want it to have a bump in the lowpoly but without having to merge the vertex of the bump, just having it floating there, how to do that? i tried some stuff, but all of them end up with horrible results. 

For this second one, i was searching on sketchfap and artstation to have an idea of what to do, and in this situation seems that people just intersect those pieces which end up with a very sharp intersection. And i was wondering if there was another way of to do that.
 

I tried two different approach, but they both seems to be kinda meh, one, i baked the 2 pieces separately, to intersect them after, and the other i just baked them together. Also, if the normal map don`t catch those intersection, how will you paint rust and shit there?

Replies

  • Neox
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    Neox veteran polycounter
    how close will you really get ingame? that is the only thing that counts. ignore the moments when someone searches the level for normalmap errors with a sniperrifle

    if you really get close enough without doing any stunts so this becomes obvious, i would argue spending the right amount of polygons and meshing it together is a totally valid approach.
  • EarthQuake
    Just merge into into the mesh. The few vertices you save are completely irrelevant with modern hardware. Plus, merging it means better UV usage.

    Unless it should be a separate object for some sort of logical reason, like it's a part that will animate, can be removed, or will make it easier to bake without intersection errors, you should make the lowpoly a watertight shell.

    Here's an example, you can turn the wireframe on in the Viewer scene: https://www.artstation.com/artwork/EmOeK

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