is there any way to make perfect slopes or squares in the mission editor?
You can use photoshop to make a good heightmap. Look on the relic wiki for more information on that. Perfect slopes however are an absaloute bitch to do. Say for example, you wanted your heightmap to go along side stairs, so the models looked like they actually walking up stairs, and didn't go through it. That would take an age to do, and is best just to not bother with that.
well have you ever seen the map necrontyr rising? its got little necron temples with PERFECT ANGLES ticks me off
Like I said, it is possible, but it is very hard. The creator of that map probably used photoshop to create that heightmap. There is a tutorial of how to do it on relic forums. If I find the link I'll post it here for you.
there is another program that can do what u want fairly esally, but i cannot remember for the life of me where or what it is called or if it works with 1.41 tools, i read about it on the RDN somwere. I know this post is no help but it dose hold hope.