Tegra3 and anti-aliasing

Unity Engine
1

HI All,
I’m using the Unity 3.5 beta version on the Asus Transformer 2 with NVidia Tegra 3 processor. Part of the project I’m working on is to compare this device to the IPAD2. The Asus drops fps to more than half when I enable anti-aliasing via Project Settings->Quality->Anti Aliasing->2x Multi-Sampling. The IPAD2 is able to handle just setting just fine.

When I tried enabling image-based AA techniques like FXAA, they don’t seem to work on the tablet. But my fps remained high. I concluded that FXAA based AA is not supported in Tegra3.

However, I read on multiple places that Tegra2,3 processors support a different AA method called CSAA
http://www.nvidia.com/content/PDF/tegra_white_papers/Bringing_High-End_Graphics_to_Handheld_Devices.pdf.

Are there any plans to add support for this in Unity in future.
Any other pointers on enabling AA while keeping high fps is appreciated :slight_smile:
thanks
arun

2

CSAA is not generally considered suitable for production.

It works by rendering the full image (minimum) 4x larger then downsampling. It’s basically the brute force approach and would have the worst performance characteristics of all the options.