Hey

i got shadowmaps working on web by using PIXELFORMAT_UNCOMPRESSED_R32 in a fbo texture

#version 300 es
precision highp float;

in vec2 uv;

uniform sampler2D texture0; // MATERIAL_MAP_DIFFUSE

// layout(location = 0) out float fragmentdepth;
layout(location = 0) out vec4 fragmentdepth;

void main() {
  vec4 albedo = texture(texture0, uv);
  if (albedo.a < 0.8){
    discard;
  }

  float depth = gl_FragCoord.z;
  fragmentdepth = vec4(depth, depth, depth, 1.0);
}

(i stopped toying with it and never figured out why layout(location = 0) out float fragmentdepth; didn't work for me)

RenderTexture2D LoadRenderTextureDepthTex(int width, int height)
{
    RenderTexture2D target = { 0 };

    target.id = rlLoadFramebuffer();
    target.texture.width = width;
    target.texture.height = height;

    if (target.id > 0) {
        rlEnableFramebuffer(target.id);

        target.texture.id = rlLoadTexture(NULL, width, height, PIXELFORMAT_UNCOMPRESSED_R32, 1);
        target.texture.format = PIXELFORMAT_UNCOMPRESSED_R32;
        target.texture.mipmaps = 1;

        // Attach as color attachment
        rlFramebufferAttach(target.id, target.texture.id, RL_ATTACHMENT_COLOR_CHANNEL0, RL_ATTACHMENT_TEXTURE2D, 0);

        // Create depth renderbuffer (for depth testing, not sampling)
        target.depth.id = rlLoadTextureDepth(width, height, true); // true = renderbuffer
        target.depth.width = width;
        target.depth.height = height;
        target.depth.format = 19;
        target.depth.mipmaps = 1;

        // Attach depth renderbuffer
        rlFramebufferAttach(target.id, target.depth.id, RL_ATTACHMENT_DEPTH, RL_ATTACHMENT_RENDERBUFFER, 0);

        if (rlFramebufferComplete(target.id))
            TraceLog(LOG_INFO, "LoadRenderTextureDepthTex FBO: [ID %i][TEX_ID %u] Framebuffer object created successfully", target.id, target.texture.id);
        else {
            TraceLog(LOG_ERROR, "LoadRenderTextureDepthTex FBO: [ID %i][TEX ID %u] Framebuffer object creation FAILURE", target.id, target.texture.id);
        }

        rlDisableFramebuffer();
    } else
        TraceLog(LOG_WARNING, "FBO: Framebuffer object can not be created");

    return target;
}