dome light texture resolution

V-Ray V-Ray for 3ds Max General
1

I do not know 512 or 2048 or change.
How can I check the resolution changes in the dome light?

2

There will be a noticeable difference in the lighting when the texture resolution is adjusted between small and high values. Generally high values produces more accurate lighting and bigger render time,

You can refer to this topic for more details:
http://forums.chaosgroup.com/showthread.php?53002-IBL-Vray-dome-light-settings&p=448942#post448942

3

Thank you. Has been a great help.