How to works with decals?

[bitterman]

It's not about how to create material for decals.

It's about when/how it can be generated/placed on the surface.

E.g. is it possible to draw decals (like scratch, dirt etc) if one brush/model collide/dropdown/touch with others?

In vanilla assets I see decals only for projectiles (like bullets).
If it collide with brush then engine generate a decal, which is defined in projectile.def.

What entities (except projectiles) can generate decals? How type of collision allowed for decals?

Thanks.

P.S. On modwiki I see link to 'Alphabet Decals manual' but it sends in nowhere ((

[argoon]

It's not about how to create material for decals.

It's about when/how it can be generated/placed on the surface.

E.g. is it possible to draw decals (like scratch, dirt etc) if one brush/model collide/dropdown/touch with others?

In vanilla assets I see decals only for projectiles (like bullets).
If it collide with brush then engine generate a decal, which is defined in projectile.def.

What entities (except projectiles) can generate decals? How type of collision allowed for decals?

Thanks.

P.S. On modwiki I see link to 'Alphabet Decals manual' but it sends in nowhere ((

Is func_splat what you are looking for?

Btw Grimm has a custom system to splat decals on surfaces you could see how it was done.   

[bitterman]

Thanks, it's works.

After some experiments:

[bitterman]

... and seems like only for brushes 

For actors I can generate decals only via idProjectile (but this is more powerful thing with wound&splat decals and smoke particles).

Something like static stretched plasma's projectile.