Hello! I really like Grid and Dirt’s damage model, It deforms realistically, The bumpers hang while damaged, then detached eventually. The hood goes up, and if too fast or head on crash, it’s gone. And takes out the spoiler too. Any tips on that?
It’s not the answer you want to hear, I guess. But such damage models can take an effort of several weeks or even months.
In its simplest form, you’d probably check collision points, determine the sub-objects that were affected and do some pseudo-random damaging, i.e. components get loose and hang around using the physics engine’s joints.
If you want proper deformation that corresponds to all kinds of impacts, you’d either need to enter the world of mesh-deforming yourself (which can be tricky if you need it accurately and realistically) or you’d buy an asset, if there’s one that fits your needs.
I personally can’t give any specific tips on how to approach that though, it’s a huge thing after all. Sorry for that.
It’s definitely not easy, but I did stumble across a deformation tutorial awhile back I can link you.
Like Suddoha says, it’s a huge subject, if you’re new to Unity you should absolutely start with something simpler, if you’re talking about damage generally and perhaps want to destroy something simple like a crate, Brackey’s released a great tutorial on the subject.
Just a fair note, to make something like the crate, you’ll still need a decent knowledge of 3D modelling to make all the pieces.