Out of Core Textures implementation in V-Ray GPU

Updated April 04, 2024 08:13

Introduction

With V-Ray 6 update 2 for Maya and Houdini (and the latest Hotifx for 3Ds Max), V-Ray GPU is able to offload Textures to system memory, to lower GPU memory usage significantly with little impact on performance. This is an entirely new implementation of Out Of Core(the old implementation is deprecated and removed from the UI). This new feature should be used for rendering massive scenes with many high-resolution textures, in which GPU memory is insufficient to render the scene. If your scene data fits in the memory of your GPU, it is best to stick to GPU memory for rendering. To use OOC Textures, enable Use System Memory For Textures option in the UI When enabled, all textures that are bigger than 1 MB in size will be allocated in CPU memory and become accessible to all rendering devices.

Note: OOC Textures is supported in both CUDA and RTX engines, and could be used with hybrid Rendering Note, V-Ray GPU uses PCIE bandwidth to move texture data to system memory. PCIE 4.0/5.0(in newer CPUs and motherboards) will show little impact on rendering performance

Note: all texture modes(Resize, Compressed..etc) are greyed out when OOC is enabled.

Use System Memory for textures enabling in Maya

Use System Memory for textures enabling in 3ds Max

Testing

We have tested 3 scenes on an RTX 4090 using Progressive mode, the results are double-checked. To ensure accurate results. All tests run for at least 5 minutes.