Mesh wall replacements that fit an existing structure?

[Ayumi Dagostino]

Hi there,

I have recently rented out an apartment in a roleplay sim which has a limit of 75 prims. The existing walls and staircase have fairly generic textures and I am not allowed to edit the existing structure itself, only add to it,  so I am interested in customising the interior by clamping on 'replacement' walls and stairs with my own textures to give a unique feel to the apartment compared to others in the sim. I have seen a few other people do this very well using mesh, and I am interested in learning how to do this.

I have tried this once in the past and was somewhat successful but I had a very hard time making sure that the mesh fit the existing structure perfectly. I would greatly appreciate some advice on how I can make a low land impact mesh that fits perfectly over the existing prim-based structure and can be textured as I wish. If my intentions are unclear, I can provide screenshots of some existing customisations from the sim. 

Thank you in advance for the help! <3

[Rolig Loon]

I've had some luck taking photos that I can use as display images in Blender, to get proportions right.  That plus making very careful measurements have made it possible to get close enough that minor in-world tweaking can do the rest.  There may be a more sophisticated way to do it, but so far that's worked for me.

[Kwakkelde Kwak]

Not sure if it's still an option, but in the past you could download your own creations from SL (in Firestorm and Singularity?) and open them in a 3d editor.

If that's (still) the case, you could build over the existing prims with new prims and export that to have a perfect base for your mesh object(s).

It's a bit shady concerning copyright laws, so you might want to ask the original creator of the objects if you are allowed to do so.