Thank you all for the kind words. The poll looks to me like this:

Most people want to have free textures plus a tutorial about how to apply those textures with shaders in Gamestudio. Half of them think about buying it.

Here is my idea: We create this pack with more and better textures as shown above. We offer ten (or even more) of them for free so that you all can play around with them. We add a tutorial to our pack with a working shader and a sample project including some code for dynamic lighting.

Because of download traffic I would like to keep the free textures at 512 pixels while the commercial ones will be at least 1024. My partner even wants to create them 2048 with all CG artists in mind.
The free pack could be restricted to non-commercial projects. But that is just an idea.

So you all could make shader games and when you like it then just buy it for your final game. The price will be affordable like all our texture packs are.

My partner thinks about creating a second pack only with panels and screens from sci-fi monitors and electrical devices. But I think a few from them will make it in the first pack as well.

Here is a last question of mine:
Do you like to have textures that have baked lighting so that you can use them even without shaders and look similiar to the shaded ones (but with static baked shadows)? Maybe as another non-shader pack for old-school-projects?

Best regards,
Frank