Env map for skylight positioning

[ringostar]

I am trying to map a domelight with a tex map. In order to save pixels and RAM I cut the lower half (as it is black anyway) away.

How can I position the texture correctly on the domelight? The texture placement node allows to rotate but not to set tiling/scaling/repetitons.

Any ideas anyone?

[t.petrov]

Have you tried to use a tiled exr file format. In theory it should save RAM automatically.

[ringostar]

For rendering only I could go for tiled but if you use it in the viewport the file will be uncompressed and it takes really long to load, same for swatches...

[ivaylo.ivanov]

Then this is the problem I think. Tiled exrs have mipmap levels which can be used to load lower resolutions. In theory, this can improve the performance noticeably. F.e. if we load a preview with 512x512 size from 4k image, it should be 64x faster. Will check if this is not working in this way. Cutting the texture in half only for this half dome case is not much of a performance gain.

[ivaylo.ivanov]

Yep, tiled exrs are working very fast for me - both the viewport and the swatch rendering should load lower res mipmap.