A very simple Maxscript tool that will flash chosen objects - in your scene - between two alternating colours. This is handy if you don't want to hide any part of your scene yet want to keep track of certain objects. To use - select the nodes you wish to flash and click the 'Flash Selected Nodes' button. Those objects will now flash in your scene regards of whether they are selected or not. You can modify the two flashing colours and also adjust the speed in which they flash. NOTE: Always close or disable the flashing before saving!
Download and copy the file to UI/Macroscripts inside your 3dsmax root directory and reboot Max. You'll now find it under the 'Oakley Tools' category.