How does Octane use Vram for textures - help please

[Moonhowl]

Hi,

I have what I hope is a very simple question and apologies if it comes across as ignorant;

I have a scene that has 700 MB worth of textures (size on disk drive) and some 3.5 million polygons worth of geometry.

When I render the entire scene, textures included, it shows 7.2 gb of VRam usage.

When I load just the geometry with a simple override material (so it doesn't load textures) it shows just about 1.5 gb of Vram usage.

How is it possible that 700mb worth of textures on hard drive loads as 5.5 gigs of Vram usage?

Now I know that several materials in the scene re-use the same textures - would that have something to do with it?

[Lewis]

Do you have any displacements and HDRIs in scene ?

[Moonhowl]

No I don't, the scene is exactly as described above.

[Moonhowl]

Figured it out after some more digging on the forums - so size does matter:-) Just not the file size dummy but pixel size! Turns out model comes with a bunch of 4k*4k and even some 11k textures...i'm going to batch downscale and that should help...cheerio!