Red dots, red spots, green spots

Trying to make a single post of some of the common causes of the
red spots, dots and blots.

Help me out here, really a terror for us right now.

1. Co-planar faces
2. Ward shader
3. Angular HDRI
4. Sub-objects selected within objects
5. uncheck max shadecontext

Bear in mind this is not all the posts and some of them are rather old
just trying to make finding a little easier.

Post with script for switching out WARD shader (thanks again!)
http://www.chaosgroup.com/forum/phpBB2/viewtopic.php?t=18138&highlight=ward

Other posts related to:
http://www.chaosgroup.com/forum/phpBB2/viewtopic.php?t=10399&highlight=red+spots
http://www.chaosgroup.com/forum/phpBB2/viewtopic.php?t=11312&highlight=red+spots
http://www.chaosgroup.com/forum/phpBB2/viewtopic.php?t=15773&highlight=red+spots
http://www.chaosgroup.com/forum/phpBB2/viewtopic.php?t=11807&highlight=red+spots
http://www.chaosgroup.com/forum/phpBB2/viewtopic.php?t=10988&highlight=red+spots
http://www.chaosgroup.com/forum/phpBB2/viewtopic.php?t=12843&highlight=red+spots
http://www.chaosgroup.com/forum/phpBB2/viewtopic.php?t=14271&highlight=red+dots

There is the “sun” glitter but NOT associated with the “red spot” issue.
See: http://www.chaosgroup.com/forum/phpBB2/viewtopic.php?t=18183

I seem to remember getting colored splotches when I used to use RPC’s. That was max 7 and vray 1.47…I don’t use RPC’s anymore.

yes make sure all rpc’s vray properties are set to emit and receive no GI.