Maincubemap in shadertoy

Sina_dallal_gadim · December 23, 2024, 5:43pm

Hello to all
Is there a solution to convert maincubemap?
Like what’s in this shader

snaut · December 31, 2024, 3:50pm

have a look at the wiki article on writing a GLSL TOP, especially the Sampler section:

cheers
Markus

Sina_dallal_gadim · January 1, 2025, 5:10am

thank you
I read it
I think it should be by sTD3DInputs[TD_NUM_3D_INPUTS]; Enter the shader
But how should the maincubemap itself be converted?

snaut · January 2, 2025, 2:32pm

Hi @Sina_dallal_gadim,

are you looking for a way to generate a cubemap? You can use the Projection TOP to convert from for example a Equirectangular texture to a Cube Map.

cheers
Markus

Sina_dallal_gadim · January 2, 2025, 6:35pm

Yes, I am familiar with that method
My problem is that I don’t know when dealing with such shaders
How to convert them? Can you convert an example to learn?

snaut · January 3, 2025, 12:30pm

Hi @Sina_dallal_gadim,

sorry, I misread your question. The GLSL TOP is currently not able to output CubeMap textures.

It seems like the cubemap is storing volumetric data of a 128x128x128 voxel grid. You could try saving the same data into a 2D Texture array which can be generated with a GLSL TOP and then pass this on into another GLSL TOP generating the final image.

Hope this helps a bit
cheers
Markus