dae -> 3D tiles, missing textures

[DFic]

Tried to convert dae model to 3D tiles, and it's working, except the textures are missing in resulting 3D tiles model.

Link to original thread at Cesium forum:
https://cesiumjs.org/forum/#!msg/cesium-dev/2IlV8hvDR3Q/oF6s0KvmCAAJ

[lilleyse]

Hi @DFic,

If you drag and drop both medvedgrad1a.dae and the medvedgrad1a texture folder onto the Upload Data page you should get a tileset with textures. Maybe only the .dae file was uploaded when you tried?

[DFic]

Thanks Sean,
drag and drop is a solution for textures, I tried to use "open" for textures but then path was lost.

Just one more thing, noticed that 3D tiles models are bit darker then same glft models ( please see attached comparison image).

[lilleyse]

3D Tiles uses glTF 2.0 which has a different shading model than glTF 1.0 and may account for those differences.

To make the tileset brighter try setting tileset.lightColor. The default is (1.5, 1.4, 1.2)

[DFic]

Having a hard time finding a detailed reference about tileset.lightColor, especially about those three parameters.
General info only in https://cesiumjs.org/Cesium/Build/Documentation/Cesium3DTileset.html?classFilter=cesium3dtileset#lightColor

pls, could u share a small code example?

[OmarShehata]

Try:

tileset.lightColor = new Cesium.Cartesian3(3, 2.8, 2.4)

Does that make it brighter for you?

[lilleyse]

I'm going to close this for now. @DFic let us know if you still have any questions.

[shueseman-skyline]

This doesn't seem to work, tried in Cesium versions 1.53 and 1.56. I, too, am looking to "brighten" up a tileset. You can test in your sandcastle (https://cesiumjs.org/Cesium/Build/Apps/Sandcastle/?src=3D%20Tiles%20Photogrammetry.html) and add the line above (tileset.lightColor = new Cesium.Cartesian3(3, 2.8, 2.4);) into the sandcastle

[OmarShehata]

@lilleyse can correct me if I'm wrong here, but I think this is because photogrammetry tilesets use an unlit material so that they are unaffected by light sources in the scene.

If you try this on the 3D Tiles interior model here it works:

https://cesiumjs.org/Cesium/Build/Apps/Sandcastle/?src=3D%20Tiles%20Interior.html

Try:

var lightIntensity = 20;
var sunColor = new Cesium.Cartesian3(3, 2.8, 2.4);

Cesium.Cartesian3.multiplyByScalar(sunColor, lightIntensity, tileset.lightColor) 

I know you can apply styles CesiumGS/cesium#7255 to photogrammetry tilesets but that won't help make it brighter though.