Decal Painter Invisible when empty

## Round ID:
Round ID: 6477

## Testmerges:
BYOND Version: 515.1609
Server revision compiled on: 2023-07-15T18:50:22+00:00
Master commit: [491093b651c589f11e87b8064fe9d4562b6b5838](https://github.com/BeeStation/NSV13/commit/491093b651c589f11e87b8064fe9d4562b6b5838)
The following pull requests are currently test merged:
[#2400: 'Enables Byond 515' by covertcorvid at commit 38f61a1394](https://github.com/BeeStation/NSV13/pull/2400)
[#2411: 'Updates client versions' by covertcorvid at commit c531cae54a](https://github.com/BeeStation/NSV13/pull/2411)
[#2432: 'Aetherwhisp Mapping Fixes' by SerynEngi at commit cac3c8bacb](https://github.com/BeeStation/NSV13/pull/2432)
[#2445: 'Fixes holomap dels' by Bokkiewokkie at commit a0a2c06272](https://github.com/BeeStation/NSV13/pull/2445)
[#2447: 'AMS shot counter' by covertcorvid at commit e56882db62](https://github.com/BeeStation/NSV13/pull/2447)
[#2448: 'Showers no longer are useless for contamination above 0 but below 18' by DeltaFire15 at commit 2a2e5c498a](https://github.com/BeeStation/NSV13/pull/2448)
[#2451: 'Skinsuit temperature resistance upgrade' by SerynEngi at commit 725ba57044](https://github.com/BeeStation/NSV13/pull/2451)
[#2461: 'Fix the HomeOne' by SerynEngi at commit 460ddabb3b](https://github.com/BeeStation/NSV13/pull/2461)
[#2459: 'Personal Armor Bullet/Laser rebalance' by SerynEngi at commit 902859a8b3](https://github.com/BeeStation/NSV13/pull/2459)
[#2453: '[PORT] Gives foxes a walking animation' by Bobbanz1 at commit 8db23484c4](https://github.com/BeeStation/NSV13/pull/2453)
[#2427: '[PORT] Cargo and Cyborg Munitions Upgrade' by Bobbanz1 at commit 35b5a8f00a](https://github.com/BeeStation/NSV13/pull/2427)
[#2467: 'Fixes squad manager download and run permissions' by covertcorvid at commit 6c6277cc0d](https://github.com/BeeStation/NSV13/pull/2467)
[#2466: 'Makes latejoins wake up from cryostasis instead of arriving on a shuttle' by covertcorvid at commit 33b9f401a5](https://github.com/BeeStation/NSV13/pull/2466)
[#2472: 'Coffee typo fix' by BlueHNT at commit 02000e53ea](https://github.com/BeeStation/NSV13/pull/2472)
[#2473: 'Adds the black skirt and maid outfit to the torp shop' by DrSirKnight at commit 182e93c4aa](https://github.com/BeeStation/NSV13/pull/2473)
[#2469: 'Tycoon Request Consoles and Stormdrive Fix' by SerynEngi at commit 2370a369e5](https://github.com/BeeStation/NSV13/pull/2469)
[#2387: 'Hammerhead Atmos and Hangar Rebuild' by SerynEngi at commit e2aea39778](https://github.com/BeeStation/NSV13/pull/2387)
[#2274: '[PORT] Flavor Roleplaying Overhaul' by Bobbanz1 at commit 88f6bb36cb](https://github.com/BeeStation/NSV13/pull/2274)

Local commit: 4c91ef1259031e9802bcb58fb8137b4c4832b223
TGS version: 5.12.7
DMAPI version: 5.6.1

Current Informational Settings:
Protect Authority Roles From Traitor: 1
Protect Assistant Role From Traitor: 0
Protect Command Roles From Traitor: 1
Enforce Human Authority: 0
Allow Latejoin Antagonists: 1
Enforce Continuous Rounds: 17 of 29 roundtypes
Allow Midround Antagonists: 7 of 29 roundtypes

## Reproduction:
Get Decal Painter
Use all of the paint
it turns invisible

Reproduce the issue by obtaining a Decal Painter and using all of its paint until it becomes invisible. Then locate the Decal Painter implementation and any related tests or rendering entry points. Done means the painter remains visible after its paint is exhausted.

Written by the indexing model from the issue text.