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uniform vec3 skyColor;color[0.67,1,1]
uniform bool UseBackgroundPicture; checkbox[false]
uniform vec2 RotatePicXY;slider[(-2.0,-2.0),(0.0,0.0),(2.0,2.0)]
uniform float BackgroundExposure; slider[-3,0,3]
uniform sampler2D texture; file[Ditch-River_Env.hdr]

vec2 spherical(vec3 n) {
	return vec2 (acos(n.z)/PI, atan(n.y,n.x)/(2.0*PI) );
}

vec3 getBackground( in vec3 rd ){
vec3 backColor = skyColor;		
float theta = 1.57079633;
backColor = texture2D( texture, spherical(normalize(vec3(rd.x,rd.y*cos(theta)-rd.z*sin(theta), rd.y*sin(theta)+  rd.z*cos(theta) ))).yx+RotatePicXY).xyz*(-BackgroundExposure);

}

vec3 equirectangularMapOffsSc(sampler2D sampler, vec3 dir, vec2 offs, vec2 scale) {
	// Normalize, and lookup in equirectangular map.
	dir = normalize(dir);
	vec2 longlat = -vec2(atan(dir.y, dir.x) + offs.x * 2.0 * PI, acos(dir.z) + offs.y * PI) * scale * 2.0;
	return texture2D(sampler, longlat / vec2(2.0 * PI, PI)).xyz;
}

#TexParameter textureName GL_TEXTURE_MAG_FILTER GL_NEAREST
#TexParameter textureName GL_TEXTURE_WRAP_S GL_CLAMP
#TexParameter textureName GL_TEXTURE_WRAP_T GL_CLAMP
#TexParameter textureName GL_TEXTURE_MAX_LEVEL 1000
#TexParameter textureName GL_TEXTURE_WRAP_S GL_REPEAT
#TexParameter textureName GL_TEXTURE_WRAP_T GL_REPEAT
#TexParameter textureName GL_TEXTURE_MAG_FILTER GL_LINEAR
#TexParameter textureName GL_TEXTURE_MIN_FILTER GL_LINEAR_MIPMAP_LINEAR

uniform sampler2D myTexture; file[test.png]
#TexParameter myTexture GL_TEXTURE_MAX_LEVEL 1000
#TexParameter myTexture GL_TEXTURE_WRAP_S GL_REPEAT
#TexParameter myTexture GL_TEXTURE_WRAP_T GL_REPEAT
#TexParameter myTexture GL_TEXTURE_MAG_FILTER GL_LINEAR
#TexParameter myTexture GL_TEXTURE_MIN_FILTER GL_LINEAR_MIPMAP_LINEAR

glBindSampler(0, linearFiltering);