Basic questions re GPU memory consumption

Hylas

I´m still figuring out GPU rendering (IRAY). Here´s some basic questions:

- If I use the same map several times in a scene (eg the same shader on several items, or the same skin map in the diffuse and translucency channel), does the map "count" each time I use it or only once, in terms of how much GPU memory it will take up?

- Does it matter whether the maps I use are JPG or PNG? The latter are obviously larger, but I vaguely remember reading that for rendering DAZ has to "decompress" the JPGs so they will take up as much GPU space as a PNG.

Thank you!

fred9803

Hi Hylas, I had a discussion with Richard a while back and he said that if maps are shared between characters then they are only loaded once into GPU memory.

I don't know about the PNG/JPG thing. Cheers

PerttiA

The format of the files and the compression is just about storage space, when the graphic files are opened in any program they must be decompressed and the memory they will use is calculated as;
Width (px) x Height (px) x color depth (bits) / 8 (bits) / 1024^2 = MegaBytes

Hylas

Thank you for the answers!