Shader Materials don’t work with instances. Even after including instancesDeclaration and instancesVertex, the material doesn’t work because its missing the attributes “world0”, “world1”, “world2”, “world3”. I have fixed it by adding them in the materials instance, however during the process I found…

This thread should help: [image] Instances with ShaderMaterial Questions Hey, I have a problem drawing instances with ShaderMaterial. They don’t seem to be drawn. I searched it and others had the same problem years ago. Is this fixed in latest version of Babylon? What is…

When creating your shaderMaterial using the constructor you can just add the defines your want. Just include INSTANCES in the list of custom defines. If this does not work, please create a PG as this is supposed to work

[image] Null: defines[“INSTANCES”] Good Day @Deltakosh . I attempted the “INSTANCES” defines approach without success. I followed up by manually adding the world0, world1, world2, and world3 vec4 attributes but it results in weird clipping effects. Can you please provide some guidance? He…

Adding @Evgeni_Popov who is amazing with instances :slight_smile:

Thanks @Evgeni_Popov . Any idea why I am getting this error: VERTEX SHADER ERROR: 0:21: 'flat' : Illegal use of reserved word I know I am not making use of the gl_InstanceID yet, but I would like to in the future. https://www.babylonjs-playground.com/#QENFPC#63

I don’t have this error, everything is ok on my side… I do have the error in WebGL1, though, so I assume this keyword is illegal in WebGL1 (maybe you are testing with Safari which is using WebGL1?). In any case, I think int variables are not supported in WebGL1.

Good to know thanks @Evgeni_Popov . In the same setup the first 6 instances are not rendering. Any clue to why? https://www.babylonjs-playground.com/#QENFPC#66 [First_seven_instances_not_rendered]

You don’t have to manage the world0->world3 buffers, it is done automatically by the system: https://www.babylonjs-playground.com/#QENFPC#67

I am attempting to pull in just the morphTarget position logic and run a test on the first target set at full influence. I get this error: Error: VERTEX SHADER ERROR: 0:32: 'readVector3FromRawSampler' : no matching overloaded function found I see this function in the Babylon source clearly as sh…

You can use the #includes that already exist to inject the morph target code: https://www.babylonjs-playground.com/#QENFPC#75 Also, you should let the ShaderMaterial class add the correct #defines depending on the fact you use instances / morph targets (that’s why I pass an empty defines array). N…

Shader Material doesn't work with instances

Bugs

Evgeni_Popov April 17, 2021, 4:42pm 5

This thread should help:

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Shader Material doesn't work with instances

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