Huge Memory Usage whilst rendering

[matthewg]

Hey,

Recently we have been working on a model for a large retail store. When rendering our master model the ram usage ROCKETS up to about 40GB of RAM

The file size is 450MB (I know that is quite big for a sketchup model but is quite normal for the files we normally work with.

When open without rendering the model takes about 4-6 GB of ram. as soon as you hit render it climbs up to 40GB (In fact on most of our computers it dies or starts to chug.) We have a prototype computer in we are testing to increase performance and this allowed us to see the scope of which it was trying to use.

I know its hard to see the problem without having the model itself but any ideas what could be causing this monstrosity?

[Juans]

wow 40gb! Ihave no idea but could it be some very high quality texture? (like 60mb texture)

[matthewg]

There are hundreds of textures. 109 between 1-100kb, 191 between 100-200KB, 63 between 200-500KB, 18 between 500KB-> 1MB and finaly 10 between 1MB and 2MB though and the largest is 2mb. In total they total to about 108mb but i wouldn't have thought it would expand to 40GB of RAM usage?

Regards

Matt

[georgi.georgiev]

matthewg Please note that RAM usage is project-specific and does not relate to the file size. Depending on the complexity of the project (geometry count, related textures, v-ray fur, etc), and the render settings, V-Ray will use varying amounts of RAM.

Scenes with a large number of objects and/or high triangle counts require more memory to render. Bitmaps tend to take up large amounts of RAM, especially if the maps at high resolution and filesize. Large output resolutions require a significant amount of RAM to store the final image, and additional Render Elements increase that amount.

If you could share the project with us, we can take a look in detail and provide possible optimizations and workflows to reduce the memory usage. If this is alright, you can send us an archived copy (Extensions > V-Ray > Pack Project) via a file-sharing service of your choice at support@chaosgroup.com

[matthewg]

Thanks George,

I've spoken to the project manager as its a live commercial project I am able to share the project as long as you can sign an NDA. Once the PM has put it together ill send it across to the email address you provided.

Regards

Matt