Making Walls With Sims 4 Studio: Custom & Maxis Match

I have been attempting to make a textured wall with norm and spec maps and am having trouble seeing their effects in S4S 3.1.4.9(wishes). Is this a warehouse materials issue or is there simply no light source in the 3D preview? If it a materials issue what would be best for a texture that's meant to look deep and wet? If it's a light source preview issue, can we get one? The walls look okay in game(minus norm/spec mapping testing issues), but waiting 10 minutes for it to load just for a preview is ridiculous...

These instructions don't match the Wishes version of STS's home screen. I see, build: Standalone recolor, Add Swatches, Override. I'm looking for a definition of these options so I can translate the instructions from 2014 to the new version. Brand new to STS.

How do I change gameplay effects of a custom wall or floor I downloaded? Everything I've downloaded costs 1 or 4 simoleons with no environment score and I want to make some cost 12 or 16 with an environment score. I tried changing the price in the first tab and added the environment score tag in the 3rd tab but all this did was break a lot of them, turning their thumbnails into a big X, and didn't even change the price in game. I don't know what I did wrong, all I changed were those 2 things and made sure to apply the gameplay tag to all swatches.

I figured out that the Floor section in Warehouse is where I can edit the catalog tags to show the stat changes in the tooltip but I can't figure out how to edit the "tuning" for those stats to actually have an effect in game.

Edit: So I think I've figured it out? The first time when things broke I was creating a new recolor of the CC and just changing price and adding environment tags. This time I'm editing the original files directly and it seems to work so far. Since there's no "tuning" related stuff like with objects does that mean that the tags(not the tooltip tags, the section that just says "Tags") actually affect gameplay? I don't see this mentioned anywhere in this tutorial and I'm sure many people would like the fancier and more expensive walls they create to add to environment score.