Lava and fire blocks (including soul fire) do not have emissive textures, or that they actually do but have a very low emission strength. This makes them look darker than intended, and bloom does not work on these blocks.
Steps to reproduce:
Simply place lava and fire blocks in a dark space along side with other blocks that do have strong emissive textures. Ensure that bloom is enabled, and notice how bloom is applied to all other blocks but lava and fire. Notice too that lava and fire looks much darker than the other blocks.
Another way to check if emissive textures work is to check their reflections on smooth blocks, such as copper, which should reflect the emissive parts of block textures. As shown, fire and soul fire blocks are faintly reflected, while lava blocks are not reflected at all.
Please note that campfires are not affected by this issue, their fires are strong emissive.
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Latic7
Can confirm!
What's interesting is that this issue has been repeatedly mentioned (April 3, 2025 at 1:50 PM, April 3, 2025 at 7:28 PM, April 4, 2025 at 4:40 PM, April 27, 2025 at 1:04 PM, April 24, 2025 at 7:00 AM, April 20, 2025 at 3:00 AM) in the feedback post regarding how lava looks in Vibrant Visuals. In fact, the first created and most upvoted comment mentions this but no effort has been made to change the way lava looks in any of the previews.
[media][media][media][media][media][media]Can Confirm.
Lava looks Abysmal compared to any Java Shader.
You can see here.. it’s VERY obvious what looks better. And it’s also very Obvious which is Java and which is Bedrock.
[media][media]
In the …mers.tga files fire has very low values in the emissivity channel with the highest pixel I found being at 11. Lava has no emissiveness at all. I am sure the lava issue is bug, but the fire texture may be intended so that it does not appear as intense as other light source blocks.
The issue with casting colored light would be separate and is probably intended, as the documentation at https://learn.microsoft.com/en-us/minecraft/creator/documents/vibrantvisuals/lightingcustomization?view=minecraft-bedrock-stable says that setting lava as point light sources is not recommended because it would too “resource-intensive”, i.e. incredibly laggy.