Better candle and torchlight

[Mooses2k]

Related: #374

Stewie did some work on a basic wax and candle shader and a flame that always points up

Brightness of torch and how often sputters shows how burnt down it is. Can always drop if too dark and keep new one.

[Ayomideabdulazeez]

So have implemented the torches and added some few logics to the candle to make it somewhat realistic, but we would be needing some few particles for the fires/flames and smoke for the torch and we will would be needing shaders implemented for the candle , which entails candle wax dropping from the side and other candle related behaviors .

Here's a video of a fire particle in Godot , that is similar to what we want , you can pretty well interact with me @ayo so we can talk more on this

Anyways here's the video:
https://www.youtube.com/watch?v=8ngg6ueC_ks&t=79s

[Mooses2k]

PR exists for this, I'll check

[Mooses2k]

basics done and tweaked. Someone other than Ayo needs to do the particles and flicker effects

[Mooses2k]

torch and lantern flicker added, but it's quite slow and not random yet. Just a basic one using AnimationPlayer.

[Mooses2k]

• now have burning torches
• and drippings from torch
• candlelight changed to da8c38 as per Kendarr, later consider others
• apply individual candle effects to each point on floor candelabra
• better candle flame, maybe: https://www.youtube.com/watch?v=ldTahRhLHN4
• hand candelabra(s) logic
• all light sources should be shadowable once their light is turned off (test fix on candelabra and candlestick, that's the only one done so far)
• all lights to flicker immediately when on at start instead of after using first time (autoplay on load button)
• turn material emissivity off when candle off (broken)

All that's left is:

• better candle flame then apply new effect to all candles

"Stewie: I think some shader approach combine static masks and scrolling noise would give a nice result
Since the candle flame is pretty small on screen, we can get pretty fancy with what the shader is doing, without much of a performance impact
even raymarching it might be an option
but just deforming a static version with some noise might be enough, honestly
Alek — Yesterday at 5:27 PM
shader with emissive properties"

https://timengelke.medium.com/create-a-candle-flame-in-ue4-material-niagara-9f0df29574c6

https://www.youtube.com/watch?v=uBb1F02peto

https://www.shadertoy.com/view/Xss3DH

https://www.shadertoy.com/view/XsjBRm

https://www.shadertoy.com/view/MsSBD1

[Mooses2k]

reverted candle to original stylized Stewie mesh and made not a demo blocker =/

[Mooses2k]

Have two people working on better candles, one mesh shader, one particle UV

[Mooses2k]

One person uncontactable. Other has completed the shader code. Here it is:
!candle flame shader (Alek).zip

[Mooses2k]

Done, but still issues and todos:

• doesn't look great from above (maybe needs UV Distortion based on view angle Y, says Alek)
• maybe related to above, candle flames should stand upright when candle held in hand (local_coords?)
• some pixelation on the flame (maybe fixed with viewport adjustment?)
• still need to also apply mesh_instance to it to put it in proper layer - light can go through wall right now
• when trying to switch away from a candelabra in mainhand, crash in func stop_light_timer_2()
• Brightness of torch and how often sputters shows how burnt down it is. Can always drop if too dark and keep new one.
• play around with reverse cull face for lights, see what's better
• Lights need to randomly flicker, not animation... lerp/Tween to random?