You need to transfer the walls you need to have deformation to a collision.kn5 and make the non renderable. This is because in order for the deformation to work you need to set these meshes as wireframe with
[SHADER_REPLACEMENT_...]
ACTIVE=1
MESHES=1WALL_TWALL, (your meshes name)
SOFT_ERP=0.6
CULL_MODE = WIREFRAME
and then you set the materials and parameters as follows
[SURFACE_0]
WAV_PITCH=extended-0
[COLLISION_PARAMS_...]
MATERIALS=TYRE? (your materials name)
SOFT_ERP=0.6
SOFT_CFM=0.001
MAX_DEPTH=0.5
BOUNCE=0.5
FRICTION=0.1
INTENSITY=0.08
[DEFORMING_WALLS_...]
MESHES = material:TYRE?, (your materials name)
MAX_DEPTH = 1.0
RESTORATION_LAG = 0.8
DEPTH_MULT = 1.0
RADIUS_MULT = 1.0
TESSELLATION = 1
TESSELLATION_DISTANCE = 20, 100
TESSELLATION_FACTOR = 15, 3
Source:
The latest CSP release can do this: [MEDIA] [ATTACH] But there's still no documentation about it. So I wrote Ilja and he told me how to do it. So...
assettocorsamods.net
Edit Forgot to say that you need CSP preview build for this to work