TheUltimateAbsol
commented
3 years ago Here's a workaround if all you want to do is have the multimesh in the baked lightmap but not contain a lightmap of its own
Create a Spatial in your scene with the following script:
tool
extends Spatial
export(bool) var running = false setget set_running
func get_all_multimeshes(node, list=[]):
if node is MultiMeshInstance:
list.append(node)
for child in node.get_children():
get_all_multimeshes(child, list)
return list
func set_running(value):
running = value
if running:
var multi_meshes = get_all_multimeshes(get_tree().get_root())
for multi_mesh in multi_meshes:
for i in range(multi_mesh.multimesh.instance_count):
var global_xform = multi_mesh.global_transform*multi_mesh.multimesh.get_instance_transform(i)
var mesh = MeshInstance.new()
mesh.mesh = multi_mesh.multimesh.mesh
mesh.global_transform = global_xform
add_child(mesh)
mesh.set_owner(self)
mesh.use_in_baked_light = true
mesh.generate_lightmap = false
running = falseIn the editor, click the "running" checkbox and set it equal to "true". This will essentially create a copy of every multimesh in your scene and convert it to a regular mesh that will take part in lighting calculations. Then you can bake lightmaps as usual
The meshes are a temporary copy that will disappear after you reload your scene.
JFonS
stilobique
darthLeviN
vzuzik
Generated lightmap for multimesh instance (spheres - 62x992 pixels) :
Godot version: 3.3.0
OS/device including version:
Tested on both GLES2 and GLES3, Windows 10, Intel integrated graphics
Issue description:
I can't bake a lightmap into a MultiMeshInstance. Nor can I use a MultiMeshInstance in a lightmap. Given that I can bake a GridMap, I was under the impression I could bake a MultiMeshInstance as well.
Steps to reproduce:
Minimal reproduction project:
This issue is actually already covered in #45313, although the poster doesn't seem to aware at all (likely because the SSAO in the sample project made it look like the MultiMeshInstance casted a shadow)
Here's a simpler project: bakedlighmap_test.zip
This is an image of the scene after I bake the indirect light and then turn the directional light off. The lefthand side is a bunch of individual meshes (indirect light off the spheres is saved, as desired) The middle is a multimesh (nothing is saved) The left is a single sphere (for reference)