1 material and 16K image or 16 materials rotating smaller?

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Newtek Lightwave 3D (exporter developed by holocube, Integrated Plugin developed by juanjgon)

1 material and 16K image or 16 materials rotating smaller?

Postby scooternva » Wed Jul 24, 2019 5:53 pm

scooternva Wed Jul 24, 2019 5:53 pm
1. I have a circular surface that is going to have a planar normal map applied along its Y axis. I have two choices: either one material for the entire disc that uses one large 16,384 x 16,384 image, or 16 materials spun around the Y axis that use the same copy of a smaller 1,024 x 16,384 image map that gets reused and rotated for each wedge-shaped material. Question: does Octane load an image file once per model, or does it load an image over and over again for each material that uses it? If it’s the latter, I would rather create one large 16K x 16K normal map that has more variation to it, rather than cloning and spinning a smaller normal map that won’t save me any memory.

2. Ever since LightWave 9.6, I have had it drilled into my head that image maps should have dimensions that are a multiple of 8 (e.g., 256 x 256, not 256 x 258) for the sake of memory usage efficiency. Question: is the "multiples of eight" rule of thumb something that also applies to the dimensions of images used in the OctaneRender Texture Image node?

Thanks!

(edited to clarify a couple of items)
OctaneRender 2018.1.3 | LightWave 2019.0.3 | Win 10 Pro x64 1903 | 2 x Gigabyte AORUS RTX 2080 Ti Xtreme w/NVLink | Gigabyte AORUS Xtreme X399 | AMD Ryzen 2950X | 64 GB RAM | SSDs: Samsung 970 PRO 512 GB + Seagate FireCuda 510 2 TB | https://gammans.zone
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Re: 1 material and 16K image or 16 materials rotating smaller?

Postby juanjgon » Thu Jul 25, 2019 7:33 am

juanjgon Thu Jul 25, 2019 7:33 am
As far as I know, you can use any texture resolution without losing memory efficiency, and Octane will load the texture files only once, even if the same map is used from several materials or objects.

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-Juanjo
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Octane plugin development and support: LightWave and Houdini
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