Curious if there's a way to use LODbias via a material node?
I'd like to use a lower mip of my height map for BumpOffset, since simple parallax often works better with smoother maps.
I guess I could just manually downsample in Photoshop and import another texture...
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For a better parallax effect you can also chain up multiple BumpOffset nodes (alternatively rebuilt the bumpoffset nodes and include a multiply by normal.z) - this will help greatly to reduce texture swimming at steep angles.
The parallax occlusion sample on UDN is fairly complex. So I was looking for something simpler to help some students get started. I think I'll just have them downsample in PS. They can dig in further if they really want.